- 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.
- Either of two similar or closely related objects, entities etc.
verb (twin, n, ing)
- Dutch: tweeling
- French: jumeau
- German: Zwilling(de)
- Italian: gemello(it)m
- Spanish: gemelo , mellizo (italbrac, strictly speaking, gemelo is only for monozygotic siblings, whereas dizygotic siblings should always be called mellizos), cuate (italbrac, Mexico - dizygotic sibling), cuache (italbrac, Guatemala - dizygotic sibling), guacho (italbrac, Honduras), guares (italbrac, Puerto Rico), jimagua (italbrac, Cuba), morocho (italbrac, Venezuela - dizygotic sibling)
- (italbrac, transitive, obsolete except Scotland) To separate, divide.
- (italbrac, intransitive, obsolete except Scotland) To split, part; to go away, depart.
- (usually in the passive) To join, unite; to form links between (now especially of two places in different countries).
- Placetown in England is twinned with Machinville in France.
- (intransitive) To give birth to twins.
- Forming a pair of twins.
- the twin boys
- Forming a matched pair.
- twin socks
Etymology: Old English twinn, earlier getwinn, Äetwinn, from Germanic.
- Dutch: tweelings-
- German: Zwillings-
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