trip·let | \ ˈtri-plət \

Definition of triplet 

1 : one of three children or offspring born at one birth

2a : a combination, set, or group of three

b : a group of three elementary particles (such as positive, negative, and neutral pions) with different charge states but otherwise similar properties

c : an atom or molecule with an even number of electrons that have a net magnetic moment

d : codon

3 : a group of three musical notes or tones performed in the time of two of the same value

4 : a unit of three lines of verse

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Examples of triplet in a Sentence

the theater piece is actually a triplet of comedy sketches, all of them having romantic love as their theme

Recent Examples on the Web

The triplets were the toast of the human-interest news media. Julia Felsenthal, Vogue, "Three Identical Strangers Revisits a Shadowy Scientific Conspiracy," 29 June 2018 To measure the effect of the environment on their growth, each triplet was given to a family of a different socioeconomic level., "The Extremely Dark Side To The Buzzy Documentary Three Identical Strangers," 28 June 2018 Through the now-defunct Louise Wise adoption agency, an unknown number of twins and triplets were placed in different homes and secretly observed for years by researchers who diligently made home visits. Amy Kaufman,, "The surreal, sad story behind the acclaimed new doc 'Three Identical Strangers'," 1 July 2018 Also, instead of exiting the cloud randomly, the photons come through in pairs or triplets. Marissa Fessenden, Smithsonian, "Scientists Create a New Form of Light by Linking Photons," 16 Feb. 2018 The story of their reunion made it into The New York Post—which is how a photograph of the identical twins made it before the eyes of David Kellman, who turned out to be their triplet. Josephine Livingstone, The New Republic, "Three Identical Men and a Mystery," 5 July 2018 In 21% of fraternal triplet pregnancies, the kids get some of each other’s DNA. William Saletan, WSJ, "‘She Has Her Mother’s Laugh’ Review: Biology’s Strange New World," 28 June 2018 Back in 2014, 2 Chainz downplayed the hype surrounding Migos’ triplet-laden flow by crediting it to decades-old Three 6 verses. Patrick Lyons, Billboard, "10 Years Ago, Three 6 Mafia's 'Last 2 Walk' Almost Ruined Their Legacy," 24 June 2018 Sheriff Scott Israel, who was briefing journalists on the tragedy inside the school, has triplets who graduated from M.S.D. and played football and lacrosse and ran track there. Audra D. S. Burch And Patricia Mazzei, New York Times, "As Shots Ring Out, a Student Texts: ‘If I Don’t Make It, I Love You’," 14 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'triplet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of triplet

1656, in the meaning defined at sense 4

History and Etymology for triplet

triple entry 2

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Statistics for triplet

Last Updated

17 Sep 2018

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Time Traveler for triplet

The first known use of triplet was in 1656

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More Definitions for triplet



English Language Learners Definition of triplet

: one of three babies that are born at the same time to the same mother

: a combination, set, or group of three things


trip·let | \ ˈtri-plət \

Kids Definition of triplet

1 : a combination, set, or group of three

2 : one of three offspring born at one birth


trip·let | \ ˈtrip-lət \

Medical Definition of triplet 

1a : a combination, set, or group of three

b : an atom or molecule with an even number of electrons that have a net magnetic moment

c : codon

2a : one of three children or offspring born at one birth

b triplets plural : a group of three offspring born at one birth

3 : a combination of three lenses

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More from Merriam-Webster on triplet

Thesaurus: All synonyms and antonyms for triplet

Spanish Central: Translation of triplet

Nglish: Translation of triplet for Spanish Speakers

Britannica English: Translation of triplet for Arabic Speakers

Comments on triplet

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the setting in which something occurs

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