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Definition sleeper in British English

sleeper noun

[countable] noun
/ˈsliːpə(r)/
1

someone who is sleeping

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2

a train with beds for passengers to sleep in

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2.1

a railway carriage that has beds in it for passengers to sleep in

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2.2

one of the beds on a train

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3

one of the large pieces of wood that support a railway track

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4

a ring that you wear in your ear to prevent the hole from closing

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5

a film or a book that becomes very popular although it was not expected to

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Definition sleeper in British English