sleeper Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “sleeper” in the English Dictionary

"sleeper" in British English

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sleepernoun

uk   /ˈsliː.pər/ us   /ˈsliː.pɚ/
  • sleeper noun (PERSON)

a good/heavy/light sleeper
someone who sleeps in the stated way: I'm a light sleeper - the slightest noise wakes me. You won't wake him - he's such a heavy sleeper.
  • sleeper noun (ON TRAIN)

acarriage in a train with beds for passengers to sleep in, or one of the beds in this carriage, or the type of train that has these carriages: I'm travelling overnight so I've reserved a sleeper. The 11.45 to Venice is a sleeper.
  • sleeper noun (BLOCK)

[C] UK US railroad tie one of the heavy horizontal blocks that supports a railway track
  • sleeper noun (CLOTHING)

[C] US UK sleepsuit a piece of clothing for a baby that covers the whole body, worn especially at night
(Definition of sleeper from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sleeper" in American English

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sleepernoun [C]

us   /ˈsli·pər/
a sleeping person: He is a very light sleeper (= he wakes easily).
A sleeper is also a person or thing that is unexpectedly successful: We almost gave up on this line of merchandise, but it's a real sleeper – it keeps selling.
(Definition of sleeper from the Cambridge Academic Content Dictionary © Cambridge University Press)

"sleeper" in Business English

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sleepernoun [C]

uk   /ˈsliːpər/ us   also sleeper hit MARKETING
a product, film, book, etc. that becomes a sudden success, after a period of not being successful at all: The movie cost only $400,000 to make, and then blew up into a $39 million sleeper. Her book has been the big sleeper hit of the literary scene.
(Definition of sleeper from the Cambridge Business English Dictionary © Cambridge University Press)
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