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
Matt Grobar, Deadline, 22 Jan. 2025
Comments Nineties kids are kind of obsessed with twins.
—Maureen Lee Lenker, EW.com, 22 Jan. 2025
Vox Staff, Vox, 23 Jan. 2025
Still, Sweeney says anything from here on is a cherry on top of his twin sundae.
—Maureen Lee Lenker, EW.com, 22 Jan. 2025
Kristen Waggoner, Newsweek, 22 Jan. 2025
Nassif also shares his three sons Gavin, 21, and twins Christian and Collin, 18, with ex-wife Adrienne Maloof, 62.
—Hannah Sacks, People.com, 15 Jan. 2025
See all Example Sentences for twin 
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show current usage.
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Noun
Written and directed by Hallie Meyers-Shyer (Home Again), the film from Ketchup Entertainment follows Andy Goodrich (Keaton), whose life is upended when his wife and mother of their nine-year-old twins enters a 90-day rehab program, leaving him on his own with their young kids.
—Matt Grobar, Deadline, 22 Jan. 2025
Comments Nineties kids are kind of obsessed with twins.
—Maureen Lee Lenker, EW.com, 22 Jan. 2025
Adjective
These twin truths are at the heart of our nation’s debate over the policy.
—Vox Staff, Vox, 23 Jan. 2025
Still, Sweeney says anything from here on is a cherry on top of his twin sundae.
—Maureen Lee Lenker, EW.com, 22 Jan. 2025
Verb
On Sunday, January 19, the 66-year-old Law & Order star took to Instagram to share a candid shot of himself and Chanel perched on stage equipment, twinning in matching black outfits.
—Kristen Waggoner, Newsweek, 22 Jan. 2025
Nassif also shares his three sons Gavin, 21, and twins Christian and Collin, 18, with ex-wife Adrienne Maloof, 62.
—Hannah Sacks, People.com, 15 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 29 Jan. 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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