The noun mate has 9 senses (first 5 from tagged texts)
1. (4) mate, first mate -- (the officer below the master on a commercial ship)
2. (2) teammate, mate -- (a fellow member of a team; "it was his first start against his former teammates")
3. (2) mate -- (the partner of an animal (especially a sexual partner); "he loved the mare and all her mates"; "camels hate leaving their mates")
4. (1) spouse, partner, married person, mate, better half -- (a person's partner in marriage)
5. (1) match, mate -- (an exact duplicate; "when a match is found an entry is made in the notebook")
6. mate, Paraguay tea, Ilex paraguariensis -- (South American holly; leaves used in making a drink like tea)
7. mate -- (informal term for a friend of the same sex)
8. mate -- (South American tea-like drink made from leaves of a South American holly called mate)
9. checkmate, mate -- (a chess move constituting an inescapable and indefensible attack on the opponent's king)
Overview of verb mate
The verb mate has 3 senses (first 2 from tagged texts)
1. (7) copulate, mate, pair, couple -- (make love; "Birds mate in the Spring")
2. (1) match, mate, couple, pair, twin -- (bring two objects, ideas, or people together; "This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man?"; "The student was paired with a partner for collaboration on the project")
3. checkmate, mate -- (place an opponent's king under an attack from which it cannot escape and thus ending the game; "Kasparov checkmated his opponent after only a few moves")