From The Collaborative International Dictionary of English v.0.48:
mated \mated\ adj. 1. Brought together for sexual activity; bred; -- of animals. [WordNet 1.5]
2. Sorted into pairs of identical size, color, or other properties; -- used of gloves, socks, etc.
Syn: paired. [WordNet 1.5]
3. Same as married. Opposite of unmarried; as, they were a devoted couple, mated for life. [WordNet 1.5]
From The Collaborative International Dictionary of English v.0.48:
Mate \Mate\, v. t. [imp. & p. p. Mated; p. pr. & vb. n. Mating.] 1. To match; to marry. [1913 Webster]
If she be mated with an equal husband. --Shak. [1913 Webster]
2. To match one's self against; to oppose as equal; to compete with. [1913 Webster]
There is no passion in the mind of man so weak but it mates and masters the fear of death. --Bacon. [1913 Webster]
I, . . . in the way of loyalty and truth, . . . Dare mate a sounder man than Surrey can be. --Shak. [1913 Webster]
3. To breed; to bring (animals) together for the purpose of breeding; as, she mated a doberman with a German shepherd. [PJC]
4. To join together; to fit together; to connect; to link; as, he mated a saw blade to a broom handle to cut inaccessible branches. [PJC]