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Definitions

twin

[twin] / twɪn /
ADJECTIVE
dual; matching; similar
Synonyms
STRONG
binary corresponding coupled double dual geminate like matched matching paired
WEAK
copied duplicate identical parallel same selfsame twofold very same
Antonyms
STRONG
different dissimilar mismatched separate single unequal unlike
WEAK
individual singular
NOUN
person or thing closely resembling another
Synonyms
STRONG
double duplicate fellow likeness look-alike match mate ringer
WEAK
companion coordinate counterpart reciprocal
NOUN
person identical to another
Synonyms
STRONGEST
Siamese twin fraternal twin identical twin
STRONG
clone doppelganger double

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

James Whittaker was born on Feb. 10, 1929, in Seattle, about 10 minutes before the birth of Louie, his twin brother.

From Los Angeles Times • Apr. 8, 2026

People who disagree with him include his identical twin brother.

From The Wall Street Journal • Mar. 31, 2026

You may have heard about last week’s twin verdicts against Meta and YouTube, which held the tech companies liable for harms their products inflicted on young people.

From Slate • Mar. 30, 2026

Coulson's twin said she had been left with an overwhelming sense of emptiness.

From BBC • Mar. 26, 2026

Delia asked Chencho, curling up closer to her twin sister.

From "Summer of the Mariposas" by Guadalupe García McCall