Available Definitions:
1) a. - Being one of two born at a birth; as, a twin brother or sister.
2) a. - Being one of a pair much resembling one another; standing the relation of a twin to something else; -- often followed by to or with.
3) a. - Double; consisting of two similar and corresponding parts.
4) a. - Composed of parts united according to some definite law of twinning. See Twin , n., 4.
5) n. - One of two produced at a birth, especially by an animal that ordinarily brings forth but one at a birth; -- used chiefly in the plural, and applied to the young of beasts as well as to human young.
6) n. - A sign and constellation of the zodiac; Gemini. See Gemini .
7) n. - A person or thing that closely resembles another.
8) n. - A compound crystal composed of two or more crystals, or parts of crystals, in reversed position with reference to each other.
9) v. i. - To bring forth twins.
10) v. i. - To be born at the same birth.
11) v. t. - To cause to be twins, or like twins in any way.
12) v. t. - To separate into two parts; to part; to divide; hence, to remove; also, to strip; to rob.
13) v. i. - To depart from a place or thing.