1. a group of people with a shared characteristic, especially those born in the same year or participating in the same study
Usage: academic; statistical
2. companions or associates, especially those who support someone
3. a division of a Roman legion, typically consisting of 300 to 600 soldiers
Usage: historical; military

Examples

• The study followed two cohorts of students over five years.
• Researchers compared health outcomes between different age cohorts.
• The senator arrived with his usual cohorts of advisors.
• She and her cohorts planned the surprise party together.
• The Roman general commanded ten cohorts in the battle.
• Each cohort was responsible for defending a section of the wall.
• The birth cohort of 1990 showed different spending patterns than previous generations.