twin

1 of 3

noun

1
a
: either of two offspring produced in the same pregnancy
b
Twins plural : gemini
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
twinship noun

twin

2 of 3

adjective

1
: 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 : double
b
: paired in a close or necessary relationship : matching
c
: having or consisting of two identical units
d
: being one of a pair

twin

3 of 3

verb

twinned; twinning

transitive verb

1
: to bring together in close association : couple
2

intransitive verb

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
He and Amal, 47, share twins, Ella and Alexander, 7. Faisal Kutty, Newsweek, 10 Mar. 2025 Just a short hike from the parking area, this rock art features several figures, including twins. Maya Silver, Outside Online, 10 Mar. 2025
Adjective
By simulating scenarios such as fire outbreaks or leaks, Siemens has found that a digital twin solution can help minimize incidents and improve emergency response effectiveness. Rajdeep Biswas, Forbes, 12 Mar. 2025 Implementing these twin policies will prevent the chances of Russia launching another preventive military attack against other Eastern European nations. Faisal Kutty, Newsweek, 12 Mar. 2025
Verb
It’s twinned with 10+ macroeconomic indicators that affect consumer behavior. Joseph V Micallef, Forbes, 13 Mar. 2025 The couple also sported twinning Cartier Panthère rings – an awards season-appropriate romantic gesture that only true A-listers could pull off. Olivia Allen, Vogue, 10 Mar. 2025 See All Example Sentences for twin

Word History

Etymology

Noun

Middle English, from twin twofold

Adjective

Middle English, twofold, double, from Old English twinn; akin to Old Norse tvinnr two by two, Old English twā two

First Known Use

Noun

14th century, in the meaning defined at sense 1a

Adjective

1593, in the meaning defined at sense 1

Verb

14th century, in the meaning defined at transitive sense 1

Time Traveler
The first known use of twin was in the 14th century

Browse Nearby Words

Cite this Entry

“Twin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/twin. Accessed 18 Mar. 2025.

Kids Definition

twin

1 of 3 adjective
1
: 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

Medical Definition

twin

1 of 2 adjective
: born with one other or as a pair at one birth
a twin brother
twin girls

twin

2 of 2 noun
1
: either of two offspring produced at a birth
2
twins plural : a group of two offspring born at one birth
twinship noun

More from Merriam-Webster on twin

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