Meaning of “sleep in” in the English Dictionary

british dictionary

"sleep in" in British English

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sleep in

informal
phrasal verb with sleep uk /sliːp/ us /sliːp/ verb slept, slept

(Definition of “sleep in” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sleep in" in American English

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sleep in

phrasal verb with sleep us /slip/ verb [ I/T ] past tense and past participle slept /slept/

to sleep later than you usually do, or later than most people do:

Amelia is an early riser, but Gorda sleeps in whenever she can.

(Definition of “sleep in” from the Cambridge Academic Content Dictionary © Cambridge University Press)