1
a
: either of two offspring produced in the same pregnancy
b
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
twinned; twinning
1
: to bring forth twins
2
of a crystal
: to grow in a compound form with two adjoining sections that share a common plane of atoms
Synonyms
Examples of twin in a Sentence
Noun
She's the mother of twins.
The twins went swimming after lunch.
My sister just had twins.
Sarah and her brother are twins.
Adjective
the twin goals of reducing oil dependence and protecting the environment
Recent Examples on the Web
Eric Lach, The New Yorker, 3 Feb. 2025
Thankfully, the Olsen twins designed multiple bags that appear to work for the Rhode founder.
—Emily Tannenbaum, Glamour, 1 Feb. 2025
Steve Millar, Chicago Tribune, 1 Feb. 2025
Reeling from the disappearance of her twin sister, Ridley Sawyer channels her loss into solving cold cases with her true crime podcast.
—Clare Mulroy, USA TODAY, 1 Feb. 2025
Glamour, 1 Feb. 2025
The Simple Life alumna twinned with her daughter at the friend fest on Tuesday, with the mother-daughter duo wearing matching pink ensembles accented with pink hair bows.
—Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
See all Example Sentences for twin 
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Noun
The Altair twin skyscrapers, in Colombo, Sri Lanka, are seven hundred and eighty-seven feet tall, with one standing at attention and the other leaning companionably against it.
—Eric Lach, The New Yorker, 3 Feb. 2025
Thankfully, the Olsen twins designed multiple bags that appear to work for the Rhode founder.
—Emily Tannenbaum, Glamour, 1 Feb. 2025
Adjective
His twin brother, Jonah, added 10 points and six rebounds, while Malachi Perkins and Lucas Matykiewicz scored nine points apiece.
—Steve Millar, Chicago Tribune, 1 Feb. 2025
Reeling from the disappearance of her twin sister, Ridley Sawyer channels her loss into solving cold cases with her true crime podcast.
—Clare Mulroy, USA TODAY, 1 Feb. 2025
Verb
Here’s to countless incredible moments together (plus twinning photoshoots).
—Glamour, 1 Feb. 2025
The Simple Life alumna twinned with her daughter at the friend fest on Tuesday, with the mother-daughter duo wearing matching pink ensembles accented with pink hair bows.
—Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
See all Example Sentences for twin
Dictionary Entries Near twin
Cite this Entry
“Twin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/twin. Accessed 10 Feb. 2025.
Copy CitationKids Definition
twin
1 of 3 adjective1
: 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
b
: being one of a pair
a twin city
twin
2 of 3 verb
twinned; twinning
: to produce or give birth to twins
twin
3 of 3 noun
: either of two offspring produced at a birth compare fraternal twin, identical twin
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