n. In mech., a round projection on a tool or other piece to serve as a guide. A tit is usually made on the end of a counterbore, so that the hole made by it shall be concentric with the hole which it is desired to enlarge.n. An abbreviation of title; [capitalized] of Titus (a book of the New Testament).n. A teat. See teat.n. One of several small birds.n. A small or poor horse.n. A child; a girl; a young woman: a depreciatory term.n. A bit; morsel.n. In the phrase tit for tat (literally, in the original form tip for tap, ‘blow for blow’), a retaliatory return; an equivalent by way of repartee or answer: as, to give a person tit for tat in a dispute or a war of wit.To pull tightly.n. A pull.A Middle English variant of tite.