Definition of cog

• v. t. - To seduce, or draw away, by adulation, artifice, or falsehood; to wheedle; to cozen; to cheat.
• v. t. - To obtrude or thrust in, by falsehood or deception; as, to cog in a word; to palm off.
• v. i. - To deceive; to cheat; to play false; to lie; to wheedle; to cajole.
• n. - A trick or deception; a falsehood.
• n. - A tooth, cam, or catch for imparting or receiving motion, as on a gear wheel, or a lifter or wiper on a shaft; originally, a separate piece of wood set in a mortise in the face of a wheel.
• n. - A kind of tenon on the end of a joist, received into a notch in a bearing timber, and resting flush with its upper surface.
• n. - A tenon in a scarf joint; a coak.
• n. - One of the rough pillars of stone or coal left to support the roof of a mine.
• v. t. - To furnish with a cog or cogs.
• n. - A small fishing boat.