A group of people banded together or treated as a group. The research study followed a cohort of 1,000 individuals over a decade.
A group of people with a shared characteristic, usually age. The 1990 birth cohort is now entering the workforce.
A companion, associate, or supporter. He summoned his most trusted cohort to the meeting.
In ancient Rome, a military unit consisting of 300 to 600 soldiers. The Roman cohort was stationed at the frontier to defend against invasions.