Main Entry: pri'mate Etymology: Middle English primat, from Old French, from Medieval Latin primat-, primas archbishop, from Latin, leader, from primus Date: 13th century 1 often capitalized : a bishop who has precedence in a province, group of provinces, or a nation2 archaic : one first in authority or rank : LEADER 3 [New Latin Primates, from Latin, plural of primat-, primas] : any of an order (Primates) of mammals comprising humans, apes, monkeys, and related forms (as lemurs and tarsiers) -pri'mate-ship \-*ship\ noun --pri-ma'tial \pr*-*m*-sh*l\ adjective