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

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 Each triplet of nucleotides can code for the formation of a particular amino acid. Bruce Y. Lee, Forbes, 5 Jan. 2022 There were about 120,000 twin births in the United States in 2019 and 3,000 triplet births, according to the latest CDC data, with twin births accounting for just over 3 percent of all births in the country. Washington Post, 4 Jan. 2022 Ferna Puga, 23, of Tijuana, took a trolley early Friday from the U.S.-Mexico border to downtown San Diego with her 22-year-old triplet sisters. Los Angeles Times, 28 Nov. 2021 In one passage, the brass section lashes back and forth between B-flat-major and B-flat-minor chords, in fractured triplet rhythms. Alex Ross, The New Yorker, 11 Oct. 2021 Some suggest that Martindale is the triplet, separated at birth. Mike Preston,, 25 Aug. 2021 Broadway productions previously announced plans to resume earlier this summer, with the triplet of headlining juggernauts Wicked, The Lion King, and Hamilton all starting up on September 14. Jackson Mchenry, Vulture, 30 July 2021 In that gene, a set of three DNA nucleotides, represented by letters, yields one amino acid, and another triplet codes for a different amino acid. Rowan Jacobsen, Scientific American, 27 June 2021 Portland cartoonist Erin Nations’ 2018 graphic book interweaves memoir and fiction in three storylines about Nations’ gender transition, growing up as a triplet and being an awkward teen. oregonlive, 7 June 2021

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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Time Traveler for triplet

Time Traveler

The first known use of triplet was in 1656

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Dictionary Entries Near triplet

triple star



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Statistics for triplet

Last Updated

12 Jan 2022

Cite this Entry

“Triplet.” Dictionary, Merriam-Webster, Accessed 16 Jan. 2022.

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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 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

More from Merriam-Webster on triplet

Nglish: Translation of triplet for Spanish Speakers

Britannica English: Translation of triplet for Arabic Speakers


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