sleep-inDefinition of sleep-in adjective [attributive] (of a domestic employee) resident in an employer’s house:a sleep-in babysitter noun 1an instance of remaining asleep or in bed longer than usual in the morning:a well-deserved sleep-in 2a form of protest in which the participants sleep overnight in premises which they have occupied:a student sleep-in began last nightsleep-in in other Oxford dictionaries Definition of sleep-in in the US English dictionary
