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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.

A family feud erupted at Block Communications after John Robinson Block looked into a possible sale of the company, opposed by twin brother Allan Block.

From The Wall Street Journal • Apr. 5, 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

This calm approach to risk in the second quarter and beyond was outlined in twin reports on the macro and the investment outlook published Thursday.

From MarketWatch • Mar. 26, 2026

The Artemis program -- named in honor of Apollo's goddess twin -- aims to test technologies needed to one day send humans to Mars, a far more distant journey.

From Barron's • Mar. 25, 2026

I always figured that she was a twin sister to the cow that jumped over the moon.

From "Summer of the Monkeys" by Wilson Rawls