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Definition of sleeper noun from the Oxford Advanced Learner's Dictionary

sleeper

noun
 
/ˈsliːpə(r)/
 
/ˈsliːpər/
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  1. (used with an adjective) a person who sleeps in a particular way
    • a heavy/light/sound sleeper
    see also rough sleeper
  2. a person who is asleep
    • Only the snores of the sleepers broke the silence of the house.
  3. a night train with beds for passengers on it
    • the London–Edinburgh sleeper
    • I came up last night on the sleeper.
    Topics Transport by bus and trainc2
  4. (also sleeping car)
    a coach on a train with beds for people to sleep in
  5. (British English)
    (North American English tie)
    one of the heavy pieces of wood or concrete (= a hard building material) on which the rails (= metal bars) on a railway track are laidTopics Transport by bus and trainc2
  6. (informal, especially North American English) a film, play or book that for a long time is not very successful and then is suddenly a successTopics Successc2, Film and theatrec2
  7. (also sleeper agent)
    a spy who is sent to live in a country as a normal citizen and is not used until much later
    • The sleeper had lived in the US for two decades.
    • He infiltrated a terrorist sleeper cell.
  8. (British English) a ring or piece of metal that you wear in an ear that has been pierced (= had a hole made in it) to keep the hole from closing
See sleeper in the Oxford Advanced American Dictionary

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alloy
noun
 
 
From the Topic
Physics and chemistry
C2
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