spoiler

IPA: spˈɔɪɫɝ

One who spoils; a plunderer; a pillager; a robber; a despoiler.
One who corrupts, mars, or renders useless.
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.
(aeronautics) A device to reduce lift and increase drag.
(automotive) A device to reduce lift and increase downforce.
(US, chiefly politics, sports) An individual (or organisation etc.), unable to win themselves, who spoils the chances of another's victory.

(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.
(transitive, fandom slang) To tell (a person) details of how a story ends etc.

Examples of "spoiler" in Sentences

One person's spoiler is another person's information.
(A big spoiler is right there on the tabloid's cover.)
Though the title spoiler issue is rendered moot whenever the reader waves their mouse over the link.
They even did an episode about the superbowl (they all missed the game, and wanted to remain spoiler free until they could watch it together).
The spoiler is that, no, I didn't fall madly in love with my online fitness coach, which would have been a hilarious and ironic end to the story.
But when asked about the term 'spoiler', Paul had this to say: "I have no idea what exactly spoiler means," Paul said recently while in New Hampshire.
The term "spoiler" takes on new meaning when images of food that are shared with abandon ruin, for everybody else, the presentation and surprise that the chef intended.