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
Expert Panel®, Forbes.com, 27 June 2025
The Destination Earth digital twins are replicas of Earth systems used to monitor, simulate and predict the interaction between natural phenomena and human activities.
—IEEE Spectrum, 26 June 2025
Tim Lammers, Forbes.com, 28 June 2025
As viewers sip wine and share warm bowls of chili, they’re transported straight back to the early 2000s, when sleepaway camps, secret handshakes, and secret twin swaps were the height of summer fantasy.
—Elizabeth Fogarty, Better Homes & Gardens, 27 June 2025
Janine Henni, People.com, 14 June 2025
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
See All Example Sentences for twin
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
Map The Workflow With A Digital Twin Create a digital twin of your agency’s workflow before new hires start.
—Expert Panel®, Forbes.com, 27 June 2025
The Destination Earth digital twins are replicas of Earth systems used to monitor, simulate and predict the interaction between natural phenomena and human activities.
—IEEE Spectrum, 26 June 2025
Adjective
Written and directed by Coogler, Sinners stars the filmmaker’s Black Panther and Creed collaborator Jordan as twin brothers Smoke and Stack, who return home to Mississippi in 1932 after serving in World War I and working for the mob in Chicago.
—Tim Lammers, Forbes.com, 28 June 2025
As viewers sip wine and share warm bowls of chili, they’re transported straight back to the early 2000s, when sleepaway camps, secret handshakes, and secret twin swaps were the height of summer fantasy.
—Elizabeth Fogarty, Better Homes & Gardens, 27 June 2025
Verb
While Princess Kate and Princess Charlotte twinned in aqua for the military march honoring the King's official birthday as sovereign, the boys in the Wales family had a matching moment of their own.
—Janine Henni, People.com, 14 June 2025
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
See All Example Sentences for twin
Cite this Entry
“Twin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/twin. Accessed 1 Jul. 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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