Source : Webster's Revised Unabridged Dictionary (1913)

Confederate \Con*fed"er*ate\, v. t. [imp. & p. p.
   {Confederated}; p. pr. & vb. n. {Confederating}.]
   To unite in a league or confederacy; to ally.

         With these the Piercies them confederate. --Daniel.

Confederate \Con*fed"er*ate\, v. i.
   To unite in a league; to join in a mutual contract or
   covenant; to band together.

         By words men . . . covenant and confederate. --South.

Confederate \Con*fed"er*ate\, a. [L. confoederatus, p. p. of
   confoederare to join by a league; con- + foederare to
   establish by treaty or league, fr. foedus league, compact.
   See {Federal}.]
   1. United in a league; allied by treaty; engaged in a
      confederacy; banded together; allied.

            All the swords In Italy, and her confederate arms,
            Could not have made this peace.       --Shak.

   2. (Amer. Hist.) Of or pertaining to the government of the
      eleven Southern States of the United States which
      (1860-1865) attempted to establish an independent nation
      styled the Confederate States of America; as, the
      Confederate congress; Confederate money.

Confederate \Con*fed"er*ate\, n.
   1. One who is united with others in a league; a person or a
      nation engaged in a confederacy; an ally; also, an
      accomplice in a bad sense.

            He found some of his confederates in gaol.
                                                  --Macaulay.

   2. (Amer. Hist.) A name designating an adherent to the cause
      of the States which attempted to withdraw from the Union
      (1860-1865).

Source : WordNet®

Confederate
     adj 1: of or having to do with the southern Confederacy during the
            Civil War; "Confederate soldiers"
     2: united in a confederacy or league [syn: {allied}, {confederative}]

Confederate
     n 1: a supporter of the Confederate States of America
     2: someone who assists in a plot [syn: {collaborator}, {henchman},
         {partner in crime}]
     3: a person who joins with another in carrying out some plan
        (especially an unethical or illegal plan) [syn: {accomplice}]