diff --git a/python_libs/pebble-commander/pebble/commander/_commands/imaging.py b/python_libs/pebble-commander/pebble/commander/_commands/imaging.py
index 12c7a450..d6661311 100644
--- a/python_libs/pebble-commander/pebble/commander/_commands/imaging.py
+++ b/python_libs/pebble-commander/pebble/commander/_commands/imaging.py
@@ -28,7 +28,7 @@ from ..util import stm32_crc
 
 class PebbleFirmwareBinaryInfo(object):
     V1_STRUCT_VERSION = 1
-    V1_STRUCT_DEFINTION = [
+    V1_STRUCT_DEFINITION = [
         ('20s', 'build_id'),
         ('L', 'version_timestamp'),
         ('32s', 'version_tag'),
@@ -72,7 +72,7 @@ class PebbleFirmwareBinaryInfo(object):
 
     def _get_footer_struct(self):
         fmt = '<' + reduce(lambda s, t: s + t[0],
-                           PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINTION, '')
+                           PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINITION, '')
         return struct.Struct(fmt)
 
     def _get_footer_data_from_bin(self, path):
@@ -83,7 +83,7 @@ class PebbleFirmwareBinaryInfo(object):
             return footer_data
 
     def _parse_footer_data(self, footer_data):
-        z = zip(PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINTION,
+        z = zip(PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINITION,
                 self.struct.unpack(footer_data))
         return {entry[1]: data for entry, data in z}
 
diff --git a/src/fw/drivers/flash/micron_n25q/flash_private.h b/src/fw/drivers/flash/micron_n25q/flash_private.h
index a17fa539..64bd6b87 100644
--- a/src/fw/drivers/flash/micron_n25q/flash_private.h
+++ b/src/fw/drivers/flash/micron_n25q/flash_private.h
@@ -37,7 +37,7 @@ static const uint32_t FLASH_SPI_CLOCK = RCC_APB2Periph_SPI1;
 static const SpiPeriphClock FLASH_SPI_CLOCK_PERIPH = SpiPeriphClockAPB2;
 
 
-/* Pin Defintions */
+/* Pin Definitions */
 static const uint32_t FLASH_PIN_SCS = GPIO_Pin_4;
 static const uint32_t FLASH_PIN_SCLK = GPIO_Pin_5;
 static const uint32_t FLASH_PIN_MISO = GPIO_Pin_6;
diff --git a/src/fw/services/common/battery/battery_state.h b/src/fw/services/common/battery/battery_state.h
index 38a4eea6..3c9a3afb 100644
--- a/src/fw/services/common/battery/battery_state.h
+++ b/src/fw/services/common/battery/battery_state.h
@@ -50,7 +50,7 @@ typedef struct {
   //! The battery's percentage as a ratio32
   uint32_t charge_percent;
   //! WARNING: This maps to @see battery_charge_controller_thinks_we_are_charging as opposed to
-  //! the user-facing defintion of whether we're charging (100% battery).
+  //! the user-facing definition of whether we're charging (100% battery).
   bool is_charging;
   bool is_plugged;
 } PreciseBatteryChargeState;
diff --git a/tools/app_header.py b/tools/app_header.py
index 921413d1..80f2cf27 100644
--- a/tools/app_header.py
+++ b/tools/app_header.py
@@ -28,7 +28,7 @@ class PebbleAppHeader(object):
 
     # 116 bytes
     V1_STRUCT_VERSION = (0x08, 0x01)
-    V1_STRUCT_DEFINTION = [
+    V1_STRUCT_DEFINITION = [
         # format, name, deserialization transform, serialization transform
         ('B', 'sdk_version_major', None, None),
         ('B', 'sdk_version_minor', None, None),
@@ -49,9 +49,9 @@ class PebbleAppHeader(object):
 
     # 120 bytes
     V2_STRUCT_VERSION = (0x10, 0x00)
-    V2_STRUCT_DEFINTION = list(V1_STRUCT_DEFINTION)
-    del V2_STRUCT_DEFINTION[12]  # relocation list was dropped in v2.x
-    V2_STRUCT_DEFINTION += [
+    V2_STRUCT_DEFINITION = list(V1_STRUCT_DEFINITION)
+    del V2_STRUCT_DEFINITION[12]  # relocation list was dropped in v2.x
+    V2_STRUCT_DEFINITION += [
         ('I', 'resource_crc', None, None),
         ('I', 'resource_timestamp', None, None),
         ('H', 'virtual_size', None, None),
@@ -59,8 +59,8 @@ class PebbleAppHeader(object):
     V2_HEADER_LENGTH = 10 + 120
 
     DEFINITION_MAP = {
-        V1_STRUCT_VERSION: V1_STRUCT_DEFINTION,
-        V2_STRUCT_VERSION: V2_STRUCT_DEFINTION,
+        V1_STRUCT_VERSION: V1_STRUCT_DEFINITION,
+        V2_STRUCT_VERSION: V2_STRUCT_DEFINITION,
     }
 
     @classmethod
diff --git a/tools/fw_binary_info.py b/tools/fw_binary_info.py
index 33899342..9ae61132 100755
--- a/tools/fw_binary_info.py
+++ b/tools/fw_binary_info.py
@@ -23,7 +23,7 @@ import stm32_crc
 
 class PebbleFirmwareBinaryInfo(object):
     V1_STRUCT_VERSION = 1
-    V1_STRUCT_DEFINTION = [
+    V1_STRUCT_DEFINITION = [
         ('20s', 'build_id'),
         ('L', 'version_timestamp'),
         ('32s', 'version_tag'),
@@ -67,7 +67,7 @@ class PebbleFirmwareBinaryInfo(object):
 
     def _get_footer_struct(self):
         fmt = '<' + reduce(lambda s, t: s + t[0],
-                           PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINTION, '')
+                           PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINITION, '')
         return struct.Struct(fmt)
 
     def _get_footer_data_from_elf(self, path):
@@ -85,7 +85,7 @@ class PebbleFirmwareBinaryInfo(object):
             return footer_data
 
     def _parse_footer_data(self, footer_data):
-        z = zip(PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINTION,
+        z = zip(PebbleFirmwareBinaryInfo.V1_STRUCT_DEFINITION,
                 self.struct.unpack(footer_data))
         return {entry[1]: data for entry, data in z}
 
diff --git a/tools/resources/resource_map/resource_generator.py b/tools/resources/resource_map/resource_generator.py
index 83192644..87db41d4 100644
--- a/tools/resources/resource_map/resource_generator.py
+++ b/tools/resources/resource_map/resource_generator.py
@@ -46,7 +46,7 @@ class ResourceGenerator(ResourceGeneratorBase):
                     'filename': str(definition_dict['file'] if 'file' in definition_dict else None)}
         resources = [resource]
 
-        # Now generate ResourceDefintion objects for each resource
+        # Now generate ResourceDefinition objects for each resource
         target_platforms = definition_dict.get('targetPlatforms', None)
         aliases = definition_dict.get('aliases', [])
         builtin = False if bld.variant == 'applib' else definition_dict.get('builtin', False)