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
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
Sean Campbell, Sacbee.com, 3 June 2025
Its twin, Universal Terra Luna, is a bit further, diagonal from the park.
—Eve Chen, USA Today, 3 June 2025
Wendy Grossman Kantor, People.com, 4 June 2025
The girl vanished while her parents ate dinner a few hundred yards away and her 2-year-old twin siblings slept in the same room.
—Natalie Neysa Alund, USA Today, 3 June 2025
Leo Barraclough, Variety, 3 June 2025
Sofia and her mom twinned in bold red outfits, with the graduate walking across the stage in a jumpsuit with an asymmetrical off-shoulder neckline.
—Meredith Kile, People.com, 28 May 2025
See All Example Sentences for twin
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Noun
The twins, who traveled from Arizona alongside Stinnett’s wife, are angling for a revolutionary twist where the two will be cast on the same season without the rest of the contestants knowing their relationship.
—Sean Campbell, Sacbee.com, 3 June 2025
Its twin, Universal Terra Luna, is a bit further, diagonal from the park.
—Eve Chen, USA Today, 3 June 2025
Adjective
On April 18, 2023, Wilson picked up her 4-year-old twin boys from preschool then drove to her mother’s house to pick up her 1-year-old son.
—Wendy Grossman Kantor, People.com, 4 June 2025
The girl vanished while her parents ate dinner a few hundred yards away and her 2-year-old twin siblings slept in the same room.
—Natalie Neysa Alund, USA Today, 3 June 2025
Verb
As if harking back to a bygone era, twins František and Ondřej Klišík have made the stubborn decision to do just that.
—Leo Barraclough, Variety, 3 June 2025
Sofia and her mom twinned in bold red outfits, with the graduate walking across the stage in a jumpsuit with an asymmetrical off-shoulder neckline.
—Meredith Kile, People.com, 28 May 2025
See All Example Sentences for twin
Cite this Entry
“Twin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/twin. Accessed 8 Jun. 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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