Definitions
1.nounA tooth on a gear.
2.nounA gear; a cogwheel.
3.nounAn unimportant individual in a greater system.
4.nounA 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.nounOne of the rough pillars of stone or coal left to support the roof of a mine.
6.verbTo furnish with a cog or cogs.