Definition & Meaning of "cog"

Cog

a wheel with a set of square or triangular teeth sticking out around the edge that fits into the edge of a similar wheel, causing both wheels to turn

a subordinate who performs an important but routine function

to cog

join pieces of wood with cogs

roll steel ingots

Example

Cogs in a machine can't strive for excellence.

Mr Lake was an important cog in the Republican campaign machine.

Copywriters have been seen as just a cog in the big advertising machine.

The Pascaline utilized a series of gears and cogs to perform mathematical operations, pioneering the concept of mechanical computation.

Frank knew he was just a cog in the wheel of this giant corporation.

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