Mate

n. 1 friend or fellow worker. 2 colloq. form of address, esp. to another man. 3 a each of a breeding pair, esp. of birds. b colloq. partner in marriage. c (in comb.) fellow member or joint occupant of (teammate; roommate). 4 officer on a merchant ship. 5 assistant to a skilled worker (plumber’s mate). v. (ting) (often foil. by with) 1 come or bring together for breeding. 2 Mech. fit well. [Low German]