sleep-in

adjective
\ˈslēp-ˈin \

Definition of sleep-in 

(Entry 1 of 2)

: that lives at the place of employment a sleep-in maid

sleep in

verb

Definition of sleep in (Entry 2 of 2)

intransitive verb

1 : to sleep where one is employed

2a : oversleep

b : to sleep late intentionally

First Known Use of sleep-in

Adjective

1951, in the meaning defined above

Verb

1827, in the meaning defined at sense 1

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The first known use of sleep-in was in 1827

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