spoiler

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One who seizes spoils or booty.
2. n. Something that causes spoilage.
3. n. A long, narrow hinged plate on the upper surface of an airplane wing that reduces lift and increases drag when raised.
4. n. An air deflector mounted usually at the rear of an automobile to reduce lift at high speeds.
5. n. A candidate for office whose chances of winning are slight but who may get enough votes to prevent one of the leading candidates from winning.
6. n. A published piece of information that divulges a surprise, such as a plot twist in a movie.

Century Dictionary and Cyclopedia

1. n. One who or that which spoils. A plunderer; a pillager; a robber.
2. n. One who or that which impairs, mars, or decays.

Wiktionary

1. n. A document, review or comment that discloses the ending or some key surprise, or twist in a story.
2. n. A device to reduce lift.
3. n. A device to reduce lift and increase downforce
4. n. An individual (or organisation etc.), unable to win themselves, who spoil the chances of another's victory.
5. n. A comprehensive list of objects and their characteristics.

GNU Webster's 1913

1. n. One who spoils; a plunderer; a pillager; a robber; a despoiler.
2. n. One who corrupts, mars, or renders useless.
3. n. 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.
4. n. 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}.

WordNet 3.0

1. n. a candidate with no chance of winning but who may draw enough votes to prevent one of the leading candidates from winning
2. n. a hinged airfoil on the upper surface of an aircraft wing that is raised to reduce lift and increase drag
3. n. someone who pampers or spoils by excessive indulgence
4. n. someone who takes spoils or plunder (as in war)
5. n. an airfoil mounted on the rear of a car to reduce lift at high speeds