a person or animal who is asleep or who sleeps in a specified way. Example: he was a light sleeper, for long periods an insomniac
a train carrying sleeping cars. Example: we were waiting for the Inverness–London sleeper
a film, book, play, etc. that eventually achieves unexpected success after initially attracting very little attention. Example: this low-budget, black-and-white American sleeper concerns two brothers
a ring or post worn in a pierced ear to keep the hole from closing.
a wooden or concrete beam laid transversely under railway track to support it.
a stocky fish with mottled coloration which occurs widely in warm seas and fresh water.
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