Meaning of “twin” in the English Dictionary

"twin" in British English

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twinnoun [ C ]

uk /twɪn/ us /twɪn/

B1 either of two children born to the same mother on the same occasion:

My sister has twin sons.
a twin sister

one of two very similar things:

The two countries are often regarded as economic twins.

More examples

  • My twin sister and I have got the same nose.
  • Meeting a twin brother I didn't know I had was an unnerving experience.
  • A special closeness is supposed to exist between twins.
  • The youngest boys are so close in age they look like twins.
  • To avoid confusion, the twins never wore the same clothes.

twinadjective [ before noun ]

uk /twɪn/ us /twɪn/

twinverb

uk /twɪn/ us /twɪn/ UK

(Definition of “twin” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"twin" in American English

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twinnoun [ C ]

us /twɪn/

either of two children born to the same mother on the same occasion

twinadjective [ not gradable ]

us /twɪn/

Twin is used of two things that are the same or similar:

(Definition of “twin” from the Cambridge Academic Content Dictionary © Cambridge University Press)