Definition of cog noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//kɒɡ//
    ; NAmE NAmE//kɑːɡ//
    How machines work
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  1. 1one of a series of teeth on the edge of a wheel that fit between the teeth on the next wheel and cause it to move See related entries: How machines work
  2. 2= cogwheel
  3. Word OriginMiddle English: probably of Scandinavian origin and related to Swedish kugge and Norwegian kug.Idioms
    a cog in the machine/wheel
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    (informal) a person who is a small part of a large organization
See the Oxford Advanced American Dictionary entry: cog

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