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

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 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 Your fans will hear firsthand what other artists in your space are creating, and vice versa, your cohort’s fans will hear and discover you. Victoria Kennedy, Rolling Stone, 5 Aug. 2022 With one in five Australians living with disability (and many of those with invisible disabilities), it’s a disservice to overlook an entire cohort of people who are typically known as the largest minority. Maggie Zhou,, 11 May 2022 At Penn, for instance, the civil dialogue seminar is a small class whose success depends on attracting an ideologically and racially diverse cohort of students. Jennifer Miller, Washington Post, 16 Mar. 2022 If the data looks good, there’s nothing to stop the FDA from authorizing a vaccine for kids of a certain age group, even if an older cohort misses the mark or hasn’t yet gotten the green light. Caroline Chen, ProPublica, 6 Mar. 2022 Both these schools are now recruiting students for an online cohort in their part-time programs. John Byrne, Forbes, 26 Jan. 2022 There may be a cohort of patients whose care lies between emergency observation and full admission. Stephen Bohan, STAT, 2 Aug. 2022 Male students were two to three times likelier to be in the top-performing tier of their cohort. Amy Glynn, Forbes, 15 July 2022 That's in part because of the size of their cohort, about 66 million. NBC News, 6 Apr. 2022 See More

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.

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

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Last Updated

19 Aug 2022

Cite this Entry

“Cohort.” Dictionary, Merriam-Webster, Accessed 19 Aug. 2022.

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More Definitions for cohort


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.

More from Merriam-Webster on cohort

Nglish: Translation of cohort for Spanish Speakers

Britannica English: Translation of cohort for Arabic Speakers


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