|1.||one of the ten units of between 300 and 600 men in an ancient Roman Legion|
|2.||any band of warriors or associates: the cohorts of Satan|
|3.||chiefly (US) an associate or follower|
|4.||biology a taxonomic group that is a subdivision of a subclass (usually of mammals) or subfamily (of plants)|
|5.||statistics a group of people with a statistic in common, esp having been born in the same year|
|[C15: from Latin cohors yard, company of soldiers; related to hortus garden]|
cohort co·hort (kō'hôrt')
A defined population group followed prospectively in an epidemiological study.