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[spoi-ler] /ˈspɔɪ lər/
a person or thing that spoils.
a person who robs or ravages; despoiler; plunderer.
Aeronautics. a device used to break up the airflow around an aerodynamic surface, as an aircraft wing, in order to slow the movement through the air or to decrease the lift on the surface and, as a result, provide bank or descent control.
Automotive. a similar device for changing the airflow past a moving vehicle, often having the form of a transverse fin or blade mounted at the front or rear to reduce lift and increase traction at high speeds.
Sports. a team out of final contention that defeats a potential or favored contender and thereby thwarts its chances of winning a championship.
any competitor, entrant, or candidate who has no chance of ultimate victory but does well enough to spoil the chances of another.
information about a plot or event in a movie, book, or show that may spoil the suspense or surprise:
Spoilers were leaked before the movie was released. Spoiler alert! Do not read further if you haven't already seen the season finale.
Origin of spoiler
1525-35; spoil + -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for spoiler


plunderer or robber
a person or thing that causes spoilage or corruption
a device fitted to an aircraft wing to increase drag and reduce lift. It is usually extended into the airflow to assist descent and banking Compare air brake (sense 2)
a similar device fitted to a car
(sport) a competitor who adopts spoiling tactics, as in boxing
a magazine, newspaper, etc produced specifically to coincide with the production of a rival magazine, newspaper, etc in order to divert public interest and reduce its sales
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for spoiler

1530s, "one who robs or plunders," agent noun from spoil. Meaning "one who mars another's chance at victory" is attested from 1950 in U.S. politics, perhaps from boxing. Aeronautics sense is from 1928, because it destroys the "lift" on the plane; transferred to structures serving a similar purpose on speedboats (1957) and motor vehicles (1963). Meaning "information about the plot of a movie, etc., which might 'spoil' it for one who has not seen it" is attested by 1982.

Online Etymology Dictionary, © 2010 Douglas Harper
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spoiler in Technology

1. A remark which reveals important plot elements from books or movies, thus denying the reader (of the article) the proper suspense when reading the book or watching the movie.
2. Any remark which telegraphs the solution of a problem or puzzle, thus denying the reader the pleasure of working out the correct answer (see also interesting). Either sense readily forms compounds like "total spoiler", "quasi-spoiler" and even "pseudo-spoiler".
By convention, Usenet news articles which are spoilers in either sense should contain the word "spoiler" in the Subject: line, or guarantee via various tricks that the answer appears only after several screens-full of warning, or conceal the sensitive information via rot13, or some combination of these techniques.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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