Definition of spoilers:
(n) :
A document, review or comment that discloses the ending or some key surprise or twist in a story, or the internal rules controlling the behaviour of a video game, etc.
(v) :
(transitive, fandom slang) To mark (a document or message) with a spoiler warning, to prevent readers from accidentally learning details they would prefer not to know.
(v) :
(transitive, fandom slang) To tell (a person) details of how a story ends etc.
(n) :
One who spoils; a plunderer; a pillager; a robber; a despoiler.
(n) :
One who corrupts, mars, or renders useless.
(n) :
(automotive) A device to reduce lift and increase downforce.