cog

Short definition from Wiktionary

Noun

1. 1
   A tooth on a gear.
2. 2
   A gear; especially, a cogwheel.
3. 3
   An unimportant individual in a greater system.
4. 4
   A projection or tenon at the end of a beam designed to fit into a matching opening of another piece of wood to form a joint.
5. 5
   One of the rough pillars of stone or coal left to support the roof of a mine.
6. 6
   A partially clinker-built, flat-bottomed, square-rigged mediaeval ship of burden or war, with a round, bulky hull and a single mast, typically 15 to 25 meters in length, in use from ca. 1150 to 1500.
7. 7
   The hypothetical precursor ship type of the above said to be in use during the early Middle Ages, variously alleged to be Frisian or Scandinavian.
8. 8
   A small fishing boat.
9. 9
   A trick or deception; a falsehood.
10. 10
    A small round wooden vessel for holding milk.
11. 11
    Initialism of center of gravity.
12. 12
    Abbreviation of course over ground.

Verb

1. 1
   To furnish with a cog or cogs.
2. 2
   Of an electric motor or generator, to snap preferentially to certain positions when not energized.
3. 3
   To load (a die) so that it can be used to cheat.
4. 4
   To cheat; to play or gamble fraudulently.
5. 5
   To seduce, or draw away, by adulation, artifice, or falsehood; to wheedle; to cozen; to cheat.
6. 6
   To plagiarize.
7. 7
   To obtrude or thrust in, by falsehood or deception; to palm off.

Proper noun

1. 1
   Initialism of Church of God: numerous, mostly unrelated Christian denominations.