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]

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]

WordNet (r) 3.0 (2006):

mated
    adj 1: mated sexually [ant: unmated]
    2: used of gloves, socks, etc. [syn: mated, paired]
    3: of or relating to a marriage partner

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "mated":
   allied, assembled, associated, banded together, biconjugate,
   bigeminate, bijugate, bound, bracketed, collected, conjoined,
   conjugate, conjugated, connected, copulate, coupled, gathered,
   hand-in-glove, hand-in-hand, incorporated, integrated, intimate,
   joined, knotted, leagued, linked, married, matched, merged, one,
   paired, partnered, spliced, tied, undivided, united, unseparated,
   wedded, yoked