trip·​let | \ ˈtri-plət How to pronounce triplet (audio) \

Definition of triplet

1 : one of three offspring produced in the same pregnancy
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 Auburn in 1984 is the most recent team to have squared off against the Florida triplets. Mark Inabinett |, al, "Orange Bowl by the numbers: Florida vs. Virginia," 30 Dec. 2019 Including volleyball standout Lauren Elie, the Mustangs receive key varsity contributions from triplets of NBA forward Mario Elie. Jack Marrion, Houston Chronicle, "Memorial basketball teams earn sweep of Stratford," 18 Dec. 2019 The Wicked Witches of the East and the West. Reunited triplets, but one of them died. Taryn Englehart, The New Yorker, "Things People Think My Girlfriend and I Are Before Realizing We’re Lesbians," 14 Dec. 2019 For quantum computing, the UC Riverside team’s mechanism to add energy does so by manipulating the triplet state, which is a reference to a particle’s quantum positioning. Caroline Delbert, Popular Mechanics, "Photon-Boosted Lasers Could Carve Out Cancer Like a Scalpel," 3 Dec. 2019 Annette was predeceased by her triplet sister Yvonne Swanson., "Annette R. Barrett," 1 Dec. 2019 Glad to hear all's well with our favorite sisters/triplets! Emily Dixon, Marie Claire, "Kim Kardashian Transformed Kourtney and Khloé Into Her Doppelgangers for Her New Perfume Launch," 18 Nov. 2019 Vertex moved four different triplet regimens into the clinic. Adam Feuerstein, STAT, "‘A game-changer’: How Vertex delivered on cystic fibrosis," 23 Oct. 2019 Phoebe agrees to be their surrogate and ends up giving birth to triplets. Sydney Bucksbaum,, "Why Debra Jo Rupp was 'horrified' during her first Friends episode — and how the show changed her life," 21 Sep. 2019

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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Learn More about triplet

Time Traveler for triplet

Time Traveler

The first known use of triplet was in 1656

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Statistics for triplet

Last Updated

8 Jan 2020

Cite this Entry

“Triplet.” The Dictionary, Merriam-Webster Inc., Accessed 20 January 2020.

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More Definitions for triplet


How to pronounce triplet (audio)

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 How to pronounce triplet (audio) \

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 How to pronounce triplet (audio) \

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

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not to be intimidated or subdued

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