diff --git a/docs/markdown/Conference-presentations.md b/docs/markdown/Conference-presentations.md
index 15e43961f..abfc52f1e 100644
--- a/docs/markdown/Conference-presentations.md
+++ b/docs/markdown/Conference-presentations.md
@@ -8,7 +8,7 @@
 
 - GStreamer conference 2015, [Done in 6.0 seconds](https://gstconf.ubicast.tv/videos/done-in-60-seconds-a-new-build-system-for-gstreamer) (jpakkane)
 
-- LCA 2016, [Builds, dependencies and deployment in the modern multiplatform world](https://www.youtube.com/watch?v=CTJtKtQ8R5k&feature=youtu.be) (jpakkane)
+- LCA 2016, [Builds, dependencies and deployment in the modern multiplatform world](https://www.youtube.com/watch?v=CTJtKtQ8R5k) (jpakkane)
 
 - GUADEC 2016, [Making your GNOME app compile 2.4x faster](https://media.ccc.de/v/44-making_your_gnome_app_compile_24x_faster) (nirbheek)
 
diff --git a/docs/markdown/Reference-manual.md b/docs/markdown/Reference-manual.md
index 2aa966586..3fac0ff5c 100644
--- a/docs/markdown/Reference-manual.md
+++ b/docs/markdown/Reference-manual.md
@@ -430,7 +430,7 @@ be passed to [shared and static libraries](#library).
   `project`'s `default_options` overriding the values of these options
   for this target only, since 0.40.0
 - `d_import_dirs` list of directories to look in for string imports used
-  in the D programmling language
+  in the D programming language
 - `d_unittest`, when set to true, the D modules are compiled in debug mode
 - `d_module_versions` list of module versions set when compiling D sources
 
diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index 61f753586..d613f5019 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -444,9 +444,9 @@ class Backend:
         copt_proxy = OptionOverrideProxy(target.option_overrides, self.environment.coredata.compiler_options)
         # First, the trivial ones that are impossible to override.
         #
-        # Add -nostdinc/-nostdinc++ if needed; can't be overriden
+        # Add -nostdinc/-nostdinc++ if needed; can't be overridden
         commands += self.get_cross_stdlib_args(target, compiler)
-        # Add things like /NOLOGO or -pipe; usually can't be overriden
+        # Add things like /NOLOGO or -pipe; usually can't be overridden
         commands += compiler.get_always_args()
         # Only add warning-flags by default if the buildtype enables it, and if
         # we weren't explicitly asked to not emit warnings (for Vala, f.ex)
@@ -568,7 +568,7 @@ class Backend:
             if isinstance(exe, build.BuildTarget):
                 is_cross = is_cross and exe.is_cross
             if isinstance(exe, dependencies.ExternalProgram):
-                # E.g. an external verificator or simulator program run on a generated executable.
+                # E.g. an external verifier or simulator program run on a generated executable.
                 # Can always be run.
                 is_cross = False
             if is_cross:
diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index cea1b0832..bcda603ed 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -220,7 +220,7 @@ int dummy;
             outfile.write('# Suffix\n\n')
             self.generate_utils(outfile)
             self.generate_ending(outfile)
-        # Only ovewrite the old build file after the new one has been
+        # Only overwrite the old build file after the new one has been
         # fully created.
         os.replace(tempfilename, outfilename)
         self.generate_compdb()
@@ -2236,7 +2236,7 @@ rule FORTRAN_DEP_HACK
     # Fortran is a bit weird (again). When you link against a library, just compiling a source file
     # requires the mod files that are output when single files are built. To do this right we would need to
     # scan all inputs and write out explicit deps for each file. That is stoo slow and too much effort so
-    # instead just have an ordered dependendy on the library. This ensures all required mod files are created.
+    # instead just have an ordered dependency on the library. This ensures all required mod files are created.
     # The real deps are then detected via dep file generation from the compiler. This breaks on compilers that
     # produce incorrect dep files but such is life.
     def get_fortran_orderdeps(self, target, compiler):
@@ -2387,9 +2387,9 @@ rule FORTRAN_DEP_HACK
             commands += compilers.get_base_link_args(self.environment.coredata.base_options,
                                                      linker,
                                                      isinstance(target, build.SharedModule))
-        # Add -nostdlib if needed; can't be overriden
+        # Add -nostdlib if needed; can't be overridden
         commands += self.get_cross_stdlib_link_args(target, linker)
-        # Add things like /NOLOGO; usually can't be overriden
+        # Add things like /NOLOGO; usually can't be overridden
         commands += linker.get_linker_always_args()
         # Add buildtype linker args: optimization level, etc.
         commands += linker.get_buildtype_linker_args(self.get_option_for_target('buildtype', target))
diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 5f552c251..8eb95dc13 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -1137,7 +1137,7 @@ class GeneratedList:
 class Executable(BuildTarget):
     def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
         super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
-        # Unless overriden, executables have no suffix or prefix. Except on
+        # Unless overridden, executables have no suffix or prefix. Except on
         # Windows and with C#/Mono executables where the suffix is 'exe'
         if not hasattr(self, 'prefix'):
             self.prefix = ''
@@ -1746,7 +1746,7 @@ class Jar(BuildTarget):
 
 class CustomTargetIndex:
 
-    """A special opaque object returned by indexing a CustomTaget. This object
+    """A special opaque object returned by indexing a CustomTarget. This object
     exists in meson, but acts as a proxy in the backends, making targets depend
     on the CustomTarget it's derived from, but only adding one source file to
     the sources.
diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
index 032ca6957..7087b3eb4 100644
--- a/mesonbuild/compilers/compilers.py
+++ b/mesonbuild/compilers/compilers.py
@@ -451,9 +451,9 @@ class CompilerArgs(list):
         Returns whether the argument can be safely de-duped. This is dependent
         on three things:
 
-        a) Whether an argument can be 'overriden' by a later argument.  For
+        a) Whether an argument can be 'overridden' by a later argument.  For
            example, -DFOO defines FOO and -UFOO undefines FOO. In this case, we
-           can safely remove the previous occurance and add a new one. The same
+           can safely remove the previous occurrence and add a new one. The same
            is true for include paths and library paths with -I and -L. For
            these we return `2`. See `dedup2_prefixes` and `dedup2_args`.
         b) Arguments that once specified cannot be undone, such as `-c` or
@@ -511,10 +511,10 @@ class CompilerArgs(list):
                     continue
                 i = self.index(each)
                 if group_start < 0:
-                    # First occurance of a library
+                    # First occurrence of a library
                     group_start = i
             if group_start >= 0:
-                # Last occurance of a library
+                # Last occurrence of a library
                 self.insert(i + 1, '-Wl,--end-group')
                 self.insert(group_start, '-Wl,--start-group')
         return self.compiler.unix_args_to_native(self)
@@ -548,15 +548,15 @@ class CompilerArgs(list):
             raise TypeError('can only concatenate list (not "{}") to list'.format(args))
         for arg in args:
             # If the argument can be de-duped, do it either by removing the
-            # previous occurance of it and adding a new one, or not adding the
-            # new occurance.
+            # previous occurrence of it and adding a new one, or not adding the
+            # new occurrence.
             dedup = self._can_dedup(arg)
             if dedup == 1:
                 # Argument already exists and adding a new instance is useless
                 if arg in self or arg in pre or arg in post:
                     continue
             if dedup == 2:
-                # Remove all previous occurances of the arg and add it anew
+                # Remove all previous occurrences of the arg and add it anew
                 if arg in self:
                     self.remove(arg)
                 if arg in pre:
@@ -605,7 +605,7 @@ class Compiler:
             self.exelist = exelist
         else:
             raise TypeError('Unknown argument to Compiler')
-        # In case it's been overriden by a child class already
+        # In case it's been overridden by a child class already
         if not hasattr(self, 'file_suffixes'):
             self.file_suffixes = lang_suffixes[self.language]
         if not hasattr(self, 'can_compile_suffixes'):
diff --git a/mesonbuild/dependencies/dev.py b/mesonbuild/dependencies/dev.py
index 257bf7a17..a16149505 100644
--- a/mesonbuild/dependencies/dev.py
+++ b/mesonbuild/dependencies/dev.py
@@ -116,7 +116,7 @@ class LLVMDependency(ExternalDependency):
     """
 
     # Ordered list of llvm-config binaries to try. Start with base, then try
-    # newest back to oldest (3.5 is abitrary), and finally the devel version.
+    # newest back to oldest (3.5 is arbitrary), and finally the devel version.
     # Please note that llvm-config-6.0 is a development snapshot and it should
     # not be moved to the beginning of the list. The only difference between
     # llvm-config-6.0 and llvm-config-devel is that the former is used by
@@ -168,7 +168,7 @@ class LLVMDependency(ExternalDependency):
         mlog.log('Dependency LLVM found:', mlog.green('YES'))
         self.is_found = True
 
-        # Currently meson doesn't really atempt to handle pre-release versions,
+        # Currently meson doesn't really attempt to handle pre-release versions,
         # so strip the 'svn' off the end, since it will probably cuase problems
         # for users who want the patch version.
         self.version = out.strip().rstrip('svn')
diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
index 58cc9b979..0cb1450e4 100644
--- a/mesonbuild/environment.py
+++ b/mesonbuild/environment.py
@@ -154,7 +154,7 @@ def detect_windows_arch(compilers):
         # Check if we're using and inside an MSVC toolchain environment
         if compiler.id == 'msvc' and 'VCINSTALLDIR' in os.environ:
             # 'Platform' is only set when the target arch is not 'x86'.
-            # It's 'x64' when targetting x86_64 and 'arm' when targetting ARM.
+            # It's 'x64' when targeting x86_64 and 'arm' when targeting ARM.
             platform = os.environ.get('Platform', 'x86').lower()
             if platform == 'x86':
                 return platform
diff --git a/mesonbuild/mconf.py b/mesonbuild/mconf.py
index 09b0f12fc..747b9d123 100644
--- a/mesonbuild/mconf.py
+++ b/mesonbuild/mconf.py
@@ -51,7 +51,7 @@ class Conf:
         with open(self.coredata_file, 'wb') as f:
             pickle.dump(self.coredata, f)
         # We don't write the build file because any changes to it
-        # are erased when Meson is executed the next time, i.e. whne
+        # are erased when Meson is executed the next time, i.e. when
         # Ninja is run.
 
     def print_aligned(self, arr):
diff --git a/run_unittests.py b/run_unittests.py
index fe7507470..be5ce47d8 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -1958,7 +1958,7 @@ class LinuxlikeTests(BasePlatformTests):
             # Verify that -I flags from the `args` kwarg are first
             # This is set in the '43 has function' test case
             self.assertEqual(cmd[1], '-I/tmp')
-            # Verify that -O3 set via the environment is overriden by -O0
+            # Verify that -O3 set via the environment is overridden by -O0
             Oargs = [arg for arg in cmd if arg.startswith('-O')]
             self.assertEqual(Oargs, [Oflag, '-O0'])
 
diff --git a/test cases/common/125 shared module/meson.build b/test cases/common/125 shared module/meson.build
index d96d8fcae..29277e9e3 100644
--- a/test cases/common/125 shared module/meson.build	
+++ b/test cases/common/125 shared module/meson.build	
@@ -6,7 +6,7 @@ l = shared_library('runtime', 'runtime.c')
 # is a common approach for plugins that are only used
 # with dlopen. Any symbols are resolved dynamically
 # at runtime.  This requires extra help on Windows, so
-# should be avoided unless really neccessary.
+# should be avoided unless really necessary.
 m = shared_module('mymodule', 'module.c')
 e = executable('prog', 'prog.c', link_with : l, dependencies : dl)
 test('import test', e, args : m)
diff --git a/test cases/common/126 llvm ir and assembly/meson.build b/test cases/common/126 llvm ir and assembly/meson.build
index 4ce463618..acff93f77 100644
--- a/test cases/common/126 llvm ir and assembly/meson.build	
+++ b/test cases/common/126 llvm ir and assembly/meson.build	
@@ -6,7 +6,7 @@ supported_cpus = ['arm', 'x86', 'x86_64']
 foreach lang : ['c', 'cpp']
   cc = meson.get_compiler(lang)
   cc_id = cc.get_id()
-  ## Build a trivial executale with mixed LLVM IR source
+  ## Build a trivial executable with mixed LLVM IR source
   if cc_id == 'clang'
     e = executable('square_ir_' + lang, 'square.ll', 'main.' + lang)
     test('test IR square' + lang, e)
diff --git a/test cases/common/66 install subdir/subdir/meson.build b/test cases/common/66 install subdir/subdir/meson.build
index 37d2da455..a1dadd4e5 100644
--- a/test cases/common/66 install subdir/subdir/meson.build	
+++ b/test cases/common/66 install subdir/subdir/meson.build	
@@ -1,3 +1,3 @@
 install_subdir('sub1', install_dir : 'share',
-  # This mode will be overriden by the mode set in the outer install_subdir
+  # This mode will be overridden by the mode set in the outer install_subdir
   install_mode : 'rwxr-x---')
diff --git a/test cases/common/68 number arithmetic/meson.build b/test cases/common/68 number arithmetic/meson.build
index 02c7878f2..495a83e36 100644
--- a/test cases/common/68 number arithmetic/meson.build	
+++ b/test cases/common/68 number arithmetic/meson.build	
@@ -25,16 +25,16 @@ assert((5 % 2) == 1, 'Integer modulo (odd) is broken')
 assert((4 % 2) == 0, 'Integer modulo (even) is broken')
 
 if 2 * 1 % 2 != 0
-  error('Modulo precendence with multiplication is broken')
+  error('Modulo precedence with multiplication is broken')
 endif
 if 2 + 1 % 2 != 3
-  error('Modulo precendence with addition is broken')
+  error('Modulo precedence with addition is broken')
 endif
 if 9 / 9 % 2 != 1
-  error('Modulo precendence with division is broken')
+  error('Modulo precedence with division is broken')
 endif
 if 9 - 9 % 2 != 8
-  error('Modulo precendence with subtraction is broken')
+  error('Modulo precedence with subtraction is broken')
 endif
 
 assert(2.is_even(), 'int is_even() broken for even value')
diff --git a/test cases/common/71 arithmetic bidmas/meson.build b/test cases/common/71 arithmetic bidmas/meson.build
index 2a530c87e..c7334b48f 100644
--- a/test cases/common/71 arithmetic bidmas/meson.build	
+++ b/test cases/common/71 arithmetic bidmas/meson.build	
@@ -1,7 +1,7 @@
 project('arithmetic bidmas', 'c')
 
 if 5 * 3 - 6 / 2 + 1 != 13
-  error('Arithemtic bidmas broken')
+  error('Arithmetic bidmas broken')
 endif
 if 5 * (3 - 6 / 2) + 1 != 1
   error('Arithmetic bidmas with brackets broken')
diff --git a/test cases/failing/65 grab sibling/subprojects/b/sneaky.c b/test cases/failing/65 grab sibling/subprojects/b/sneaky.c
index f1cb91679..46718c6cc 100644
--- a/test cases/failing/65 grab sibling/subprojects/b/sneaky.c	
+++ b/test cases/failing/65 grab sibling/subprojects/b/sneaky.c	
@@ -1,6 +1,6 @@
 #include<stdio.h>
 
 int main(int argc, char **argv) {
-    printf("I can only come into existance via trickery.\n");
+    printf("I can only come into existence via trickery.\n");
     return 0;
 }
diff --git a/test cases/linuxlike/1 pkg-config/meson.build b/test cases/linuxlike/1 pkg-config/meson.build
index 7e438211f..17feb219f 100644
--- a/test cases/linuxlike/1 pkg-config/meson.build	
+++ b/test cases/linuxlike/1 pkg-config/meson.build	
@@ -23,7 +23,7 @@ dep2 = declare_dependency(dependencies : dep)
 exe2 = executable('zlibprog2', 'prog.c', dependencies : dep2)
 test('zlibtest2', exe2)
 
-# Try to find a nonexistant library to ensure requires:false works.
+# Try to find a nonexistent library to ensure requires:false works.
 
 dep = dependency('nvakuhrabnsdfasdf', required : false)
 
diff --git a/test cases/osx/3 has function xcode8/meson.build b/test cases/osx/3 has function xcode8/meson.build
index 300d352bf..5fe3e5378 100644
--- a/test cases/osx/3 has function xcode8/meson.build	
+++ b/test cases/osx/3 has function xcode8/meson.build	
@@ -10,16 +10,16 @@ args_10_12 = ['-mmacosx-version-min=10.12'] + sdk_args
 # Test requires XCode 8 which has the MacOSX 10.12 SDK
 if cc.version().version_compare('>=8.0')
   if cc.has_function('clock_gettime', args : args_10_11, prefix : '#include <time.h>')
-    error('Should not have found clock_gettime via <time.h> when targetting Mac OS X 10.11')
+    error('Should not have found clock_gettime via <time.h> when targeting Mac OS X 10.11')
   endif
   if not cc.has_function('clock_gettime', args : args_10_12, prefix : '#include <time.h>')
-    error('Did NOT find clock_gettime via <time.h> when targetting Mac OS X 10.12')
+    error('Did NOT find clock_gettime via <time.h> when targeting Mac OS X 10.12')
   endif
   if not cc.has_function('clock_gettime', args : args_10_11)
-    error('Did NOT find clock_gettime w/o a prototype when targetting Mac OS X 10.11')
+    error('Did NOT find clock_gettime w/o a prototype when targeting Mac OS X 10.11')
   endif
   if not cc.has_function('clock_gettime', args : args_10_12)
-    error('Did NOT find clock_gettime w/o a prototype when targetting Mac OS X 10.12')
+    error('Did NOT find clock_gettime w/o a prototype when targeting Mac OS X 10.12')
   endif
 else
   message('Test needs XCode 8, skipping...')