I. twin 1 /twɪn/ BrE AmE noun [countable]
one of two children born at the same time to the same mother:
The twins are now eight months old.
⇨ ↑ identical twin , ↑ Siamese twin
II. twin 2 BrE AmE adjective [only before noun]
[ Language: Old English ; Origin: twinn 'double' ]
1 . used to describe one of two children who are twins
twin sister/brother
Meet my twin sister.
2 . used to describe two things that happen at the same time and are related to each other:
the twin problems of poverty and unemployment
3 . twin room/bedroom a room that contains two single beds:
All the twin rooms have private bathrooms.
⇨ ↑ twinset , ↑ twin town
III. twin 3 BrE AmE verb ( past tense and past participle twinned , present participle twinning ) [transitive usually passive]
1 . British English to form a relationship between two similar towns in different countries in order to encourage visits between them
twin something with something
Chichester in England is twinned with Chartres in France.
2 . to form a relationship between two places, people, or ideas
twin something with something
Dole has been twinned in the history books with his old rival Bush.
⇨ ↑ twin town