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cog1

[kog, kawg]
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noun
  1. (not in technical use) a gear tooth, formerly especially one of hardwood or metal, fitted into a slot in a gearwheel of less durable material.
  2. a cogwheel.
  3. a person who plays a minor part in a large organization, activity, etc.: He's just a small cog in the financial department.
verb (used without object), cogged, cog·ging.
  1. (of an electric motor) to move jerkily.
verb (used with object), cogged, cog·ging.
  1. to roll or hammer (an ingot) into a bloom or slab.
Idioms
  1. slip a cog, to make a blunder; err: One of the clerks must have slipped a cog.

Origin of cog1

1200–50; Middle English cogge, probably < Scandinavian; compare Swedish, Norwegian kugg cog

cog2

[kog, kawg]
verb (used with object), cogged, cog·ging.
  1. to manipulate or load (dice) unfairly.
verb (used without object), cogged, cog·ging.
  1. to cheat, especially at dice.

Origin of cog2

First recorded in 1525–35; origin uncertain

cog3

[kog, kawg]
noun
  1. Carpentry. (in a cogged joint) the tongue in one timber, fitting into a corresponding slot in another.
  2. Mining. a cluster of timber supports for a roof.Compare chock(def 4).
verb (used with or without object), cogged, cog·ging.
  1. Carpentry. to join with a cog.

Origin of cog3

1855–60; special use of cog1; replacing cock in same sense, special use of cock1 (in sense of projection); see coak

cog.

  1. cognate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cog

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British Dictionary definitions for cog

cog1

noun
  1. any of the teeth or projections on the rim of a gearwheel or sprocket
  2. a gearwheel, esp a small one
  3. a person or thing playing a small part in a large organization or process
verb cogs, cogging or cogged
  1. (tr) metallurgy to roll (cast-steel ingots) to convert them into blooms

Word Origin

C13: of Scandinavian origin; compare Danish kogge, Swedish kugge, Norwegian kug

cog2

verb cogs, cogging or cogged
  1. slang to cheat (in a game, esp dice), as by loading a dice

Word Origin

C16: originally a dice-playing term, of unknown origin

cog3

noun
  1. a tenon that projects from the end of a timber beam for fitting into a mortise
verb cogs, cogging or cogged
  1. (tr) to join (pieces of wood) with cogs

Word Origin

C19: of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for cog

n.

c.1300, "cog wheel;" late 14c., "tooth on a wheel," probably a borrowing from a Scandinavian language (cf. Norwegian kugg "cog") and cognate with Middle High German kugel "ball."

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with cog

cog

In addition to the idiom beginning with cog

also see:

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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