Source : Webster's Revised Unabridged Dictionary (1913)

Conquer \Con"quer\, v. i.
   To gain the victory; to overcome; to prevail.

         He went forth conquering and to conquer. --Rev. vi. 2.

         The champions resolved to conquer or to die. --Waller.

Conquer \Con"quer\, v. t. [imp. & p. p. {Conquered}; p. pr. &
   vb. n. {Conquering}.] [OF. conquerre, F. conqu['e]rir, fr. L.
   conquirere, -quisitum, to seek or search for, to bring
   together, LL., to conquer; con- + quaerere to seek. See
   {Quest}.]
   1. To gain or acquire by force; to take possession of by
      violent means; to gain dominion over; to subdue by
      physical means; to reduce; to overcome by force of arms;
      to cause to yield; to vanquish. ``If thou conquer Rome.''
      --Shak.

            If we be conquer'd, let men conquer us. --Shak.

            We conquered France, but felt our captive's charms.
                                                  --Pope.

   2. To subdue or overcome by mental or moral power; to
      surmount; as, to conquer difficulties, temptation, etc.

            By winning words to conquer hearts, And make
            persuasion do the work of fear.       --Milton.

   3. To gain or obtain, overcoming obstacles in the way; to
      win; as, to conquer freedom; to conquer a peace.

   Syn: To subdue; vanquish; overcome; overpower; overthrow;
        defeat; rout; discomfit; subjugate; reduce; humble;
        crush; surmount; subject; master.

   Usage: {To Conquer}, {Vanquish}, {Subdue}, {Subjugate},
          {Overcome}. These words agree in the general idea
          expressed by overcome, -- that of bringing under one's
          power by the exertion of force. Conquer is wider and
          more general than vanquish, denoting usually a
          succession of conflicts. Vanquish is more individual,
          and refers usually to a single conflict. Thus,
          Alexander conquered Asia in a succession of battles,
          and vanquished Darius in one decisive engagement.
          Subdue implies a more gradual and continual pressure,
          but a surer and more final subjection. We speak of a
          nation as subdued when its spirit is at last broken,
          so that no further resistance is offered. Subjugate is
          to bring completely under the yoke of bondage. The
          ancient Gauls were never finally subdued by the Romans
          until they were completely subjugated. These words,
          when used figuratively, have correspondent meanings.
          We conquer our prejudices or aversions by a succesion
          of conflicts; but we sometimes vanquish our reluctance
          to duty by one decided effort: we endeavor to subdue
          our evil propensities by watchful and persevering
          exertions. Subjugate is more commonly taken in its
          primary meaning, and when used figuratively has
          generally a bad sense; as, his reason was completely
          subjugated to the sway of his passions.

Source : WordNet®

conquer
     v 1: to put down by force or authority; "suppress a nascent
          uprising"; "stamp down on littering"; "conquer one's
          desires" [syn: {suppress}, {stamp down}, {inhibit}, {subdue},
           {curb}]
     2: take possession of by force, as after an invasion; "the
        invaders seized the land and property of the inhabitants";
        "The army seized the town"; "The militia captured the
        castle" [syn: {appropriate}, {capture}, {seize}]
     3: overcome by conquest; "conquer your fears"; "conquer a
        country"