The Collaborative International Dictionary of English v.0.48:

Trophy \Tro"phy\, n.; pl. Trophies. [F. troph['e]e (cf. It. &
   Sp. trofeo), L. tropaeum, trophaeum, Gr. ?, strictly, a
   monument of the enemy's defeat, fr.? a turn, especially, a
   turning about of the enemy, a putting to flight or routing
   him, fr. ? to turn. See Trope.]
   1. (Gr. & Rom. Antiq.) A sign or memorial of a victory raised
      on the field of battle, or, in case of a naval victory, on
      the nearest land. Sometimes trophies were erected in the
      chief city of the conquered people.
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   Note: A trophy consisted originally of some of the armor,
         weapons, etc., of the defeated enemy fixed to the trunk
         of a tree or to a post erected on an elevated site,
         with an inscription, and a dedication to a divinity.
         The Romans often erected their trophies in the Capitol.
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   2. The representation of such a memorial, as on a medal; esp.
      (Arch.), an ornament representing a group of arms and
      military weapons, offensive and defensive.
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   3. Anything taken from an enemy and preserved as a memorial
      of victory, as arms, flags, standards, etc.
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            Around the posts hung helmets, darts, and spears,
            And captive chariots, axes, shields, and bars,
            And broken beaks of ships, the trophies of their
            wars.                                 --Dryden.
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   4. Any evidence or memorial of victory or conquest; as, every
      redeemed soul is a trophy of grace.
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