Source : Webster's Revised Unabridged Dictionary (1913)

Valor \Val"or\, n. [OE. valour, OF. valor, valur, valour, F.
   valeur, LL. valor, fr. L. valere to be strong, or worth. See
   {Valiant}.] [Written also {valour}.]
   1. Value; worth. [Obs.] ``The valor of a penny.'' --Sir T.
      More.

   2. Strength of mind in regard to danger; that quality which
      enables a man to encounter danger with firmness; personal
      bravery; courage; prowess; intrepidity.

            For contemplation he and valor formed. --Milton.

            When valor preys on reason, It eats the sword it
            fights with.                          --Shak.

            Fear to do base, unworthy things is valor. --B.
                                                  Jonson.

   3. A brave man; a man of valor. [R.] --Ld. Lytton.

   Syn: Courage; heroism; bravery; gallantry; boldness;
        fearlessness. See {Courage}, and {Heroism}.

Source : WordNet®

valour
     n : the qualities of a hero or heroine; exceptional or heroic
         courage when facing danger (especially in battle); "he
         showed great heroism in battle"; "he received a medal for
         valor" [syn: {heroism}, {gallantry}, {valor}, {valorousness},
          {valiance}, {valiancy}]