<p><strong>Noun</strong></p><ul><li>a partner in marriage; spouse.</li><li>one member of a pair of mated animals.</li><li>one of a pair: I can't find the mate to this glove.</li><li>a counterpart.</li><li>an associate; fellow worker; comrade; partner (often used in combination): classmate; roommate.</li><li>friend; buddy; pal (often used as an informal term of address): Let me give you a hand with that, mate.</li><li>Nautical: first mate.</li><li>any of a number of officers of varying degrees of rank subordinate to the master of a merchant ship.</li><li>an assistant to a warrant officer or other functionary on a ship.</li><li>an aide or helper, as to an artisan; factotum.</li><li>a gear, rack, or worm engaging with another gear or worm.</li><li>Archaic: an equal in reputation; peer; match.</li></ul>