Meaning of TWIN in English

TWIN

I. ˈtwin noun

Etymology: Middle English, from twin twofold

Date: 14th century

1.

a. : either of two offspring produced at a birth

b. plural , capitalized : Gemini

2. : one of two persons or things closely related to or resembling each other

3. : a compound crystal composed of two adjoining crystals or parts of crystals of the same kind that share a common plane of atoms

• twin·ship -ˌship noun

II. verb

( twinned ; twin·ning )

Date: 14th century

transitive verb

1. : to bring together in close association : couple

2. : duplicate , match

intransitive verb

1. : to bring forth twins

2. : to grow as a twin crystal

III. adjective

Etymology: Middle English, twofold, double, from Old English twinn; akin to Old Norse tvinnr two by two, Old English twā two

Date: 1593

1. : born with one other or as a pair at one birth

my twin brother

twin girls

2.

a. : made up of two similar, related, or connected members or parts : double

b. : paired in a close or necessary relationship : matching

c. : having or consisting of two identical units

d. : being one of a pair

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.