• IPA: /twɪn/, [tw̥ɪn]

twin (plural twins)

1. 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.
2. Either of two similar or closely related objects, entities etc.
3. A room in a hotel, guesthouse, etc. with two beds; a twin room.
4. (US) A twin size mattress or a bed designed for such a mattress.
5. (crystallography) A twin crystal.

• twindle, twinling, doublet (in the sense of twins and triplets)

• French: jumeau, jumelle
• German: Zwilling, Zwillingin
• Italian: gemello, gemella
• Portuguese: gémeo (Portugal), gémea (Portugal), gêmeo (Brazil), gêmea (Brazil)
• Russian: близне́ц
• Spanish: gemelo (identical), gemela (identical), mellizo (dizygotic), melliza (dizygotic), chachagua (Nicaragua), chacho (El Salvador), cuache (Guatemala), cuape (Nicaragua), cuate (Mexico), cuata (Mexico), guacho (Honduras), guape (Costa Rica), guápil (Costa Rica), guares (Puerto Rico), jimagua (Cuba), mello (Colombian Caribbean Coast), morocho (Venezuela)

• French: twin
• German: Doppelzimmer

twin (twins, present participle twinning; past and past participle twinned)

1. (transitive, obsolete, outside, Scotland) To separate, divide.
2. (intransitive, obsolete, outside, Scotland) To split, part; to go away, depart.
3. (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.

   Coventry twinned with Dresden as an act of peace and reconciliation, both cities having been heavily bombed during the war.

   • 1847, Alfred Tennyson, The Princess: A Medley, London: Edward Moxon, […], OCLC 2024748 ↗, part 1:

     Still we moved / Together, twinned, as horse's ear and eye.

4. (intransitive) To be paired or suited.
5. (intransitive) To give birth to twins.
6. (intransitive, obsolete) To be born at the same birth.

twin (not comparable)

1. double; dual; occurring as a matching pair

   twin beds, twin socks

2. forming a pair of twins.

   the twin boys

• (forming a matched pair) twofold; see also Thesaurus:dual

• German: Zwillings-
• Portuguese: gêmeo

• Portuguese: gêmeo

twin (plural twins)

1. (baseball) A player who plays for the Minnesota Twins.