'Spoiler' definitions:

Definition of 'spoiler'

From: WordNet
noun
A candidate with no chance of winning but who may draw enough votes to prevent one of the leading candidates from winning
noun
Someone who takes spoils or plunder (as in war) [syn: plunderer, pillager, looter, spoiler, despoiler, raider, freebooter]
noun
Someone who pampers or spoils by excessive indulgence [syn: pamperer, spoiler, coddler, mollycoddler]
noun
An airfoil mounted on the rear of a car to reduce lift at high speeds
noun
A hinged airfoil on the upper surface of an aircraft wing that is raised to reduce lift and increase drag

Definition of 'Spoiler'

From: GCIDE
  • Spoiler \Spoil"er\ (spoil"[~e]r), n.
  • 1. One who spoils; a plunderer; a pillager; a robber; a despoiler. [1913 Webster]
  • 2. One who corrupts, mars, or renders useless. [1913 Webster]
  • 3. (Aeronautics) A device attached to the wing of an airplane or other airfoil, which breaks the smooth flow of air during flight and decreases the lift of the airfoil; -- used to control the attitude of the airplane during banking or descent. [PJC]
  • 4. A device attached to a car to decrease lift and increase traction, usually shaped as a flat surface and attached above the rear of the car, and working on the same principal as the aircraft spoiler[3]. [PJC]