The Collaborative International Dictionary of English v.0.48:

Mate \Mate\ (m[=a]t), n. [F. mat, abbrev. fr. ['e]chec et mat.
   See Checkmate.] (Chess)
   Same as Checkmate.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mate \Mate\, a.
   See 2d Mat. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mate \Mate\, v. t. [F. mater to fatigue, enfeeble, humiliate,
   checkmate. See Mate checkmate.]
   [1913 Webster]
   1. To confuse; to confound. [Obs.] --Shak.
      [1913 Webster]

   2. To checkmate.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mate \Mate\, n. [Perhaps for older make a companion; cf. also
   OD. maet companion, mate, D. maat. Cf. Make a companion,
   Match a mate.]
   1. One who customarily associates with another; a companion;
      an associate; any object which is associated or combined
      with a similar object.
      [1913 Webster]

   2. Hence, specifically, a husband or wife; and among the
      lower animals, one of a pair associated for propagation
      and the care of their young.
      [1913 Webster]

   3. A suitable companion; a match; an equal.
      [1913 Webster]

            Ye knew me once no mate
            For you; there sitting where you durst not soar.
                                                  --Milton.
      [1913 Webster]

   4. (Naut.) An officer in a merchant vessel ranking next below
      the captain. If there are more than one bearing the title,
      they are called, respectively, first mate, second mate,
      third mate, etc. In the navy, a subordinate officer or
      assistant; as, master's mate; surgeon's mate.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mate \Ma"te\ (m[aum]"t[asl]), n. [Sp.]
   The Paraguay tea, being the dried leaf of the Brazilian holly
   (Ilex Paraguensis). The infusion has a pleasant odor, with
   an agreeable bitter taste, and is much used for tea in South
   America.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mate \Mate\, v. i.
   To be or become a mate or mates, especially in sexual
   companionship; as, some birds mate for life; this bird will
   not mate with that one.
   [1913 Webster]

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):

mate
    n 1: the officer below the master on a commercial ship [syn:
         mate, first mate]
    2: a fellow member of a team; "it was his first start against
       his former teammates" [syn: teammate, mate]
    3: the partner of an animal (especially a sexual partner); "he
       loved the mare and all her mates"; "camels hate leaving their
       mates"
    4: a person's partner in marriage [syn: spouse, partner,
       married person, mate, better half]
    5: an exact duplicate; "when a match is found an entry is made
       in the notebook" [syn: match, mate]
    6: one of a pair; "he lost the mate to his shoe"; "one eye was
       blue but its fellow was brown" [syn: mate, fellow]
    7: South American holly; leaves used in making a drink like tea
       [syn: mate, Paraguay tea, Ilex paraguariensis]
    8: informal term for a friend of the same sex
    9: South American tea-like drink made from leaves of a South
       American holly called mate
    10: a chess move constituting an inescapable and indefensible
        attack on the opponent's king [syn: checkmate, mate]
    v 1: engage in sexual intercourse; "Birds mate in the Spring"
         [syn: copulate, mate, pair, couple]
    2: 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" [syn:
       match, mate, couple, pair, twin]
    3: 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" [syn: checkmate, mate]