A ​group of ​people who ​share a characteristic.
cohort noun [C ]. › a ​group of ​people who ​share a characteristic, usually age: About 42% of women in this age cohort have a college degree. This year's cohort of ​graduates will have particular difficulties ​finding ​jobs.  Definition. Group whose members share a significant experience at a certain period of time or have one or more similar characteristics. People born in the same year, for example, are the birth cohorts (generation) for that year.  For other senses of this word, see cohort (disambiguation) . A cohort study or panel study is a form of longitudinal study (a type of observational study) used in medicine, nursing, social science, actuarial science, business analytics, and ecology.  cohort. a group of people. She has cohorts of admirers.  technical: a group of people used in a study who have something (such as age or social class) in common. Depression was a common problem for people in that age cohort.  Usage Notes. A cohort was originally one of the ten divisions of a legion in the Roman army, containing from 300 to 600 men. The most common use of cohort today is in the sense “group” or “company”: A cohort of hangers-on followed the singer down the corridor.  cohort. in epidemiology a group of individuals who share a characteristic acquired at the same time. The term usually refers to a birth cohort, which contains animals born in a specified time period. cohort studies. a prospective or follow-up, analytical, epidemiological study.  cohort. Clinical trials A group of persons with a common characteristic, set of characteristics or exposure, who are followed for the incidence of new diseases or events, as in a cohort for a prospective study. in epidemiology a group of individuals who share a characteristic acquired at the same time. The term usually refers to a birth cohort, which contains animals born in a specified time period. cohort studies. a prospective or follow-up, analytical, epidemiological study. Use cohort in a sentence. LINK / CITE ADD TO WORD LIST. noun. The definition of a cohort is a group of people who have come together in support of a common cause, or a group of people who share a common characteristic. A band of warriors fighting for the same cause are an example of a group of cohorts. 
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meaning of cohorts