Definitionen
1.NounOne who spoils; a plunderer; a pillager; a robber; a despoiler.
2.NounOne who corrupts, mars, or renders useless.
3.NounA 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. .mw-parser-output .defdate{font-size:smaller}"Good netiquette dictates that one warn of spoilers before discussing them, so that readers who wish to do so may experience the surprises for themselves."
4.NounA device to reduce lift and increase drag.
5.NounA device to reduce lift and increase downforce.
6.NounA competitor, unable to win themselves, who spoils the chances of another’s victory.
7.VerbTo mark (a document or message) with a spoiler warning, to prevent readers from accidentally learning details they would prefer not to know.
8.VerbTo tell (a person) details of how a story ends etc."I've been spoilered, so I doubt I'll be able to enjoy the final episode."