Twin definition

twĭn
A twin-size bed.
noun
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Being two or one of two offspring born at the same birth.

Twin sisters.

adjective
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One of two identical or similar people, animals, or things; a counterpart.
noun
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(mineralogy) Two interwoven crystals that are mirror images of each other.
noun
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One of two offspring born at the same birth.
noun
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Being two or one of two identical or similar people, animals, or things.

Twin cities; a twin bed.

adjective
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(botany) Of or relating to structures, such as flowers, that occur in pairs.
adjective
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To be paired or coupled.
verb
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To give birth to twins.
verb
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(archaic) To be one of twin offspring.
verb
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To pair or couple.
verb
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To provide a match or counterpart to.
verb
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adjective
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Consisting of or being two separate but similar or closely related things; forming a pair; double; paired.
adjective
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Being one of a pair of such things; being a counterpart.
adjective
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Being two offspring from the same pregnancy.

Twin girls.

adjective
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Being either one of two offspring from the same pregnancy.

A twin sister.

adjective
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A compound crystal of two crystals or parts having a common face but in reversed positions with respect to each other.
noun
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noun
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To give birth to twins.
verb
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To be paired or coupled (with another)
verb
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(archaic) To be born at the same birth.
verb
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To give birth to as twins.
verb
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To be or provide a counterpart to.
verb
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To pair or couple.
verb
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One of two offspring born at the same birth.
noun
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Being two or one of two offspring born at the same birth.

Twin sisters.

adjective
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One of two offspring born of a single gestation. Identical twins result from the division of a fertilized egg. Fraternal twins result from the fertilization of two separate eggs at the same time.
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A crystal structure consisting of two intergrown crystals that are mirror images of each other. Mineral twins can form as result of defective crystal growth in response to stress from rock deformation or during magma cooling.
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(baseball) A player that plays for the Minnesota Twins.
noun
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Of or relating to twins or being a twin.
prefix
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Having or consisting of two, double, twofold.

A twin-engine plane.

This boat is twinhulled.

prefix
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Existing as a pair.

They require a twin-bed accommodation.

prefix
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Consisting of two identical or similar parts.

A twin lamp fixture.

adjective
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1
Either one of two offspring from the same pregnancy: twins are either identical (produced from the same ovum) or fraternal (produced from separate ova)
noun
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Either one of two persons or things very much alike in appearance, shape, structure, etc.
noun
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the Twins
  • Gemini, the constellation and third sign of the zodiac
idiom
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Other Word Forms

Noun

Singular:
twin
Plural:
twins, twins

Idioms and Phrasal Verbs

the Twins

Origin of twin

  • Middle English from Old English twinn twofold dwo- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From twin.

    From Wiktionary