Source : Webster's Revised Unabridged Dictionary (1913)

Fight \Fight\, n. [OE. fight, feht, AS. feoht. See {Fight}, v.
   i.]
   1. A battle; an engagement; a contest in arms; a combat; a
      violent conflict or struggle for victory, between
      individuals or between armies, ships, or navies, etc.

            Who now defies thee thrice to single fight.
                                                  --Milton.

   2. A struggle or contest of any kind.

   3. Strength or disposition for fighting; pugnacity; as, he
      has a great deal of fight in him. [Colloq.]

   4. A screen for the combatants in ships. [Obs.]

            Up with your fights, and your nettings prepare.
                                                  --Dryden.

   {Running fight}, a fight in which the enemy is continually
      chased; also, one which continues without definite end or
      result.

   Syn: Combat; engagement; contest; struggle; encounter; fray;
        affray; action; conflict. See {Battle}.

Fight \Fight\ (f[imac]t), v. i. [imp. & p. p. {Fought}
   (f[add]t); p. pr. & vb. n. {Fighting}.] [OE. fihten, fehten,
   AS. feohtan; akin to D. vechten, OHG. fehtan, G. fechten, Sw.
   f["a]kta, Dan. fegte, and perh. to E. fist; cf. L. pugnare to
   fight, pugnus fist.]
   1. To strive or contend for victory, with armies or in single
      combat; to attempt to defeat, subdue, or destroy an enemy,
      either by blows or weapons; to contend in arms; --
      followed by with or against.

            You do fight against your country's foes. --Shak.

            To fight with thee no man of arms will deign.
                                                  --Milton.

   2. To act in opposition to anything; to struggle against; to
      contend; to strive; to make resistance.

   {To fight shy}, to avoid meeting fairly or at close quarters;
      to keep out of reach.

Fight \Fight\, v. t.
   1. To carry on, or wage, as a conflict, or battle; to win or
      gain by struggle, as one's way; to sustain by fighting, as
      a cause.

            He had to fight his way through the world.
                                                  --Macaulay.

            I have fought a good fight.           --2 Tim. iv.
                                                  7.

   2. To contend with in battle; to war against; as, they fought
      the enemy in two pitched battles; the sloop fought the
      frigate for three hours.

   3. To cause to fight; to manage or maneuver in a fight; as,
      to fight cocks; to fight one's ship.

   {To fight it out}, to fight until a decisive and conclusive
      result is reached.

Source : WordNet®

fight
     v 1: be engaged in a fight; carry on a fight; "the tribesmen
          fought each other"; "Siblings are always fighting" [syn:
           {struggle}]
     2: fight against or resist strongly; "The senator said he would
        oppose the bill"; "Don't fight it!" [syn: {oppose}, {fight
        back}, {fight down}, {defend}]
     3: make a strenuous or labored effort; "She struggled for years
        to survive without welfare"; "He fought for breath" [syn:
        {struggle}]
     4: exert oneself continuously, vigorously, or obtrusively to
        gain an end or engage in a crusade for a certain cause or
        person; be an advocate for; "The liberal party pushed for
        reforms"; "She is crusading for women's rights"; "The Dean
        is pushing for his favorite candidate" [syn: {crusade}, {press},
         {campaign}, {push}, {agitate}]
     [also: {fought}]

fight
     n 1: the act of fighting; any contest or struggle; "a fight broke
          out at the hockey game"; "there was fighting in the
          streets"; "the unhappy couple got into a terrible scrap"
          [syn: {fighting}, {combat}, {scrap}]
     2: an intense verbal dispute; "a violent fight over the bill is
        expected in the Senate"
     3: a boxing match; "the fight was on television last night"
        [syn: {bout}]
     4: a hostile meeting of opposing military forces in the course
        of a war; "Grant won a decisive victory in the battle of
        Chickamauga"; "he lost his romantic ideas about war when
        he got into a real engagement" [syn: {battle}, {conflict},
         {engagement}]
     5: an aggressive willingness to compete; "the team was full of
        fight" [syn: {competitiveness}]
     [also: {fought}]