mitt / mit/ • n. (usu. mitts) a mitten: oven mitts. ∎ Baseball a mittenlike glove, worn by the catcher and first baseman. ∎ a glove leaving the fingers and thumb-tip exposed. ∎ inf. a person's hand.PHRASES: keep one's mitts off inf. keep one's hands away from; not touch: keep your mitts off the fan control!