Source : Webster's Revised Unabridged Dictionary (1913)

Gallantry \Gal"lant*ry\, n.; pl. {Gallantries}. [F. galanterie.]
   1. Splendor of appearance; ostentatious finery. [Archaic]

            Guess the gallantry of our church by this . . . when
            the desk whereon the priest read was inlaid with
            plates of silver.                     --Fuller.

   2. Bravery; intrepidity; as, the troops behaved with great
      gallantry.

   3. Civility or polite attention to ladies; in a bad sense,
      attention or courtesy designed to win criminal favors from
      a female; freedom of principle or practice with respect to
      female virtue; intrigue.

   4. Gallant persons, collectively. [R.]

            Helenus, Antenor, and all the gallantry of Troy.
                                                  --Shak.

   Syn: See {Courage}, and {Heroism}.

Source : WordNet®

gallantry
     n 1: 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}, {valor}, {valour}, {valorousness},
           {valiance}, {valiancy}]
     2: courtesy towards women [syn: {chivalry}, {politesse}]
     3: polite attentiveness to women