Source : Webster's Revised Unabridged Dictionary (1913)

Partner \Part"ner\, v. t.
   To associate, to join. [Obs.] --Shak.

Partner \Part"ner\, n. [For parcener, influenced by part.]
   1. One who has a part in anything with an other; a partaker;
      an associate; a sharer. ``Partner of his fortune.''
      --Shak. Hence:
      (a) A husband or a wife.
      (b) Either one of a couple who dance together.
      (c) One who shares as a member of a partnership in the
          management, or in the gains and losses, of a business.

                My other self, the partner of my life. --Milton.

   2. (Law) An associate in any business or occupation; a member
      of a partnership. See {Partnership}.

   3. pl. (Naut.) A framework of heavy timber surrounding an
      opening in a deck, to strengthen it for the support of a
      mast, pump, capstan, or the like.

   {Dormant}, or {Silent}, {partner}. See under {Dormant}, a.

   Syn: Associate; colleague; coadjutor; confederate; partaker;
        participator; companion; comrade; mate.

Source : WordNet®

partner
     v 1: provide with a partner
     2: act as a partner; "Astaire partnered Rogers"

partner
     n 1: a person's partner in marriage [syn: {spouse}, {married
          person}, {mate}, {better half}]
     2: an associate who works with others toward a common goal;
        "partners in crime" [syn: {collaborator}, {cooperator}, {pardner}]
     3: a person who is a member of a partnership