Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “sleep in”

sleep in

informal phrasal verb with sleep     /sliːp/ verb (slept, slept)
to sleep until later in the morning than you usually do: I usually sleep in at the weekends.Sleep and sleeping
(Definition of sleep in from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of sleep in

Definitions of “sleep in” in other dictionaries

Translations of “sleep in”

Word of the Day


showing a wish to help or bring advantages to others, even if it results in disadvantage for yourself

Word of the Day


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