Definition of twin
1a : either of two offspring produced at a birthb Twins plural : 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
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Examples of twin in a sentence
She's the mother of twins.
The twins went swimming after lunch.
My sister just had twins.
Sarah and her brother are twins.
Origin and Etymology of twin
Middle English, from twin twofold
First Known Use: 14th century
twin
Definition of twin
Origin and Etymology of twin
Middle English, twofold, double, from Old English twinn; akin to Old Norse tvinnr two by two, Old English twā two
First Known Use: 1593
twin
Definition of twin
twinned
;twinning
Examples of twin in a sentence
the twin goals of reducing oil dependence and protecting the environment
14th Century
First Known Use of twin
14th century
TWIN Defined for English Language Learners
Definition of twin for English Language Learners
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: either one of two babies that are born at the same time to the same mother
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: either one of two similar things that form a pair
twin
Definition of twin for English Language Learners
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: to bring (two things) together in close association
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: to form a relationship between (two towns in two countries)
twin
Definition of twin for English Language Learners
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—used to describe children who are twins
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: made up of two similar things that are used together
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: forming one of a pair of related or connected ideas or places
TWIN Defined for Kids
Definition of twin for Students
1 : either of two offspring produced at one birth
2 : one of two persons or things closely related to or very like each other On the opposite side of the river is the city's twin.
Definition of twin for Students
1 : born with one other or as a pair at one birth my twin brother
2 : made up of two similar, related, or connected members or parts a twin-engine airplane
3 : being one of a pair Her face was a pasty white with twin spots of rouge on the cheeks. — Gail Carson Levine, Ella Enchanted
Medical Dictionary
Medical Definition of twin
: born with one other or as a pair at one birth a twin brother twin girls
twin
Medical Definition of twin
1: either of two offspring produced at a birth
2twins plural : a group of two offspring born at one birth
Learn More about twin
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See words that rhyme with twin Thesaurus: All synonyms and antonyms for twin Spanish Central: Translation of twin Nglish: Translation of twin for Spanish speakers Britannica English: Translation of twin for Arabic speakers Britannica.com: Encyclopedia article about twin
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