co·​hort | \ ˈkō-ˌhȯrt How to pronounce cohort (audio) \

Definition of cohort

1 : companion, colleague a few of their … cohorts decided to form a company— Burt Hochberg
2a : band, group a cohort of supporters
b : a group of individuals having a statistical factor (such as age or class membership) in common in a demographic study a cohort of premedical students the cohort of people born in the 1980s
c : one of 10 divisions of an ancient Roman legion
d : a group of warriors or soldiers

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Did You Know?

In ancient times, a cohort was a military unit, one of ten divisions in a Roman legion. The term passed into English via French in the 15th century, when it was used in translations and writings about Roman history. Once cohort became established in our language, its meaning was extended, first to refer to any body of troops, then to any group of individuals with something in common, and later to a single companion. Some usage commentators have objected to this last sense because it can be hard to tell whether the plural refers to different individuals or different groups. The companion sense is well established in standard use, however, and its meaning is clear enough in such sentences as her cohorts came along with her to the game.

Examples of cohort in a Sentence

The police arrested the gang's leader and his cohorts. Depression was a common problem for people in that age cohort.

Recent Examples on the Web

However, Chronicle Live understand Charnley has been in contact with a key cohort of Magpies players, including the likes of Isaac Hayden, Matt Ritchie, Fabian Schar and Jonjo Shelvey, all of whom have deals which expire in 2021., "Newcastle Managing Director in Fresh Contract Talks With Several First Team Players," 31 Aug. 2019 Together, the two organizations have so far launched eight cohorts that represent nearly 100 companies from the Americas, Europe and the UK, and the Asia Pacific region. Alicia Dunn, Fortune, "Speeding the Journey from Startup to ‘Change the World’ Company," 20 Aug. 2019 Too many of Weaving’s cohorts, however, tend toward mugging or blandness. Michael Phillips,, "‘Ready or Not’ review: I take this man as my lawful wedded husband. Now, hand me that crossbow.," 19 Aug. 2019 In the past few years, activists have been joined by a new cohort of unlikely allies: prosecutors. Seamus Kirst, Teen Vogue, "These Progressive Prosecutors Want to Reshape Justice in Major American Cities," 29 July 2019 The study, which was published in Environmental Health Perspectives, used public data from 28 years of National Health Interview Surveys linked with the National Death Index to create a large cohort of 1.6 million U.S. adults. Fox News, "Reducing air pollution could save thousands of lives, researchers say," 26 July 2019 Inspired by her example as well as others, more women started traveling alone, and the late 19th and early 20th centuries spawned a cohort of famous and adventurous solo women travel authors, including Isabelle Eberhardt and Freya Stark. Kate Siber, Outside Online, "Meet the World's First Solo Female Travel Writer," 24 July 2019 But so are Mr Johnson and Mr Koepka, and a large cohort of players, such as Patrick Cantlay and Justin Rose, sit just a half-step behind them. D.r., The Economist, "Can Rory McIlroy win on his home turf?," 17 July 2019 Lim said the school would start a third cohort of students once the original group graduates after the Spring 2020 semester. USA TODAY, "No girls, parties, cellphones: California's prison inmates are getting bachelor's degrees," 12 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cohort.' 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 cohort

15th century, in the meaning defined at sense 2c

History and Etymology for cohort

Middle English, from Latin cohort-, cohors — more at court

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Statistics for cohort

Last Updated

20 Sep 2019

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Time Traveler for cohort

The first known use of cohort was in the 15th century

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English Language Learners Definition of cohort

often disapproving : a friend or companion
technical : a group of people used in a study who have something (such as age or social class) in common


co·​hort | \ ˈkō-ˌhȯ(ə)rt How to pronounce cohort (audio) \

Medical Definition of cohort

: a group of individuals having a statistical factor (as age or risk) in common the population consisted of two cohorts: 204 clearly exposed and 163 not exposed— R. R. Suskind et al

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More from Merriam-Webster on cohort

Rhyming Dictionary: Words that rhyme with cohort

Thesaurus: All synonyms and antonyms for cohort

Spanish Central: Translation of cohort

Nglish: Translation of cohort for Spanish Speakers

Britannica English: Translation of cohort for Arabic Speakers

Comments on cohort

What made you want to look up cohort? Please tell us where you read or heard it (including the quote, if possible).


concealment of treason or felony

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