- (a.) Being one of two born at a birth; as, a twin brother or sister.
- (a.) Double; consisting of two similar and corresponding parts.
- (v.i.) To be born at the same birth.
- (v.i.) To depart from a place or thing.
- (v.t.) To separate into two parts; to part; to divide; hence, to remove; also, to strip; to rob.
- (a.) Composed of parts united according to some definite law of twinning. See Twin, n., 4.
- (v.i.) To bring forth twins.
- (n.) A sign and constellation of the zodiac; Gemini. See Gemini.
- (v.t.) To cause to be twins or like twins in any way.
- (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.
- (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.
- (n.) A person or thing that closely resembles another.
- (n.) A compound crystal composed of two or more crystals or parts of crystals, in reversed position with reference to each other.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). twin. Retrieved September 22, 2026, from http://smartdefine.org/twin/definitions/2075797 |
| Chicago | Webster's. 2011. "twin" http://smartdefine.org/twin/definitions/2075797 (accessed September 22, 2026). |
| Harvard | Webster's 2011, twin, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/twin/definitions/2075797>. |
| MLA | Webster's. "twin" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/twin/definitions/2075797> |