The Collaborative International Dictionary of English v.0.48:

Fighting \Fight"ing\, a.
   1. Qualified for war; fit for battle.
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            An host of fighting men.              --2 Chron.
                                                  xxvi. 11.
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   2. Occupied in war; being the scene of a battle; as, a
      fighting field. --Pope.
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   A fighting chance, one dependent upon the issue of a
      struggle. [Colloq.]

   Fighting crab (Zool.), the fiddler crab.

   Fighting fish (Zool.), a remarkably pugnacious East Indian
      fish (Betta pugnax), reared by the Siamese for
      spectacular fish fights.
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