Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “sleeper”

sleeper

noun [C] (BLOCK)    /ˈsliː.pər/ US  /-pɚ/ UK (US railroad tie)
one of the heavy horizontal blocks that supports a railway trackRailways and railway lines
(Definition of sleeper noun (BLOCK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of sleeper

Definitions of “sleeper” in other dictionaries

Word of the Day

crew

If you crew a boat, or crew for someone on their boat, you help to sail it.

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More