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Word of the Day Tuesday, June 9, 2026

cog

/kɒɡ/ noun · British & US
Valid in UKValid in US
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What does cog mean?

noun

A part of a machine that rotates or moves back and forth, especially one that transmits power or motion. A toothed wheel or gear.

Example

"The engineer adjusted the cog to improve the machine's efficiency."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for cog

Rhymes with cog

Etymologically related