cog āļāļ·āļāļāļ°āđāļĢ cog āļāļ·āļāļāļ°āđāļĢ One of a series of teeth, as on the rim of a wheel or gear, whose engagement transmits successive motive force to a corresponding wheel or gear.A cogwheel.A subordinate member of an organization who performs necessary but usually minor or routine functions.To load or manipulate (dice) fraudulently.To cheat, especially at dice.An instance of cheating; a swindle.A tenon projecting from a wooden beam designed to fit into an opening in another beam to form a joint.To join with tenons.