What is Cohort ?
Cohort is (noun) 1. a large group of people The Prince was followed by a cohort of journalists. 2. a group of people who are similar in a particular characteristic such as age or social backgound This year’s cohort have a better pass rate than last year’s. 3. a comrade or classmate my son and his dishevelled cohorts in Class 2 4. the division of a Roman army, one tenth of a legion A cohort contained between three and six hundred men.
source: Easier English, Student Dictionary Upper Intermediate Level