- one of a series of teeth on the edge of a wheel that fit between the teeth on the next wheel and cause it to moveTopics Engineeringc2
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- (also cogwheel)a wheel with a series of teeth on the edge that fit between the teeth on the next wheel and cause it to move
Word OriginMiddle English: probably of Scandinavian origin and related to Swedish kugge and Norwegian kug.
Idioms
See cog in the Oxford Advanced American Dictionarya cog in the machine/wheel
- (informal) a person who is a small part of a large organization
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cog