Definitions from Wiktionary ( )

▸ noun:  Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling.
▸ noun:  Either of two similar or closely related objects, entities etc.
▸ noun:  A room in a hotel, guesthouse, etc. with two beds; a twin room.
▸ noun:  (US) A twin size mattress or a bed designed for such a mattress.
▸ noun:  (aviation) A two-engine aircraft.
▸ noun:  (crystallography) A twin crystal.
▸ verb:  (transitive, obsolete outside Scotland) To separate, divide.
▸ verb:  (intransitive, obsolete outside Scotland) To split, part; to go away, depart.
▸ verb:  (usually in the passive) To join, unite; to form links between (now especially of two places in different countries); to pair with.
▸ verb:  (intransitive) To give birth to twins.
▸ verb:  (transitive) To be, or be like, a twin to (someone else); to match in some way.
▸ verb:  (intransitive) To be, or be like, a pair of twins (for example, to dress identically); to be paired or suited.
▸ adjective:  Double; dual; occurring as a matching pair.
▸ adjective:  Forming a pair of twins.
▸ noun:  (baseball) A player who plays for the Minnesota Twins.

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