The phrasal verb "sleep in" is predominantly used in informal contexts. It typically refers to the act of remaining asleep later than usual, often allowed by circumstances when one does not have to meet the normal morning schedule or obligations, such as work or school. Commonly associated with weekends or days off, it implies indulging in extra rest, or intentionally not setting an alarm to wake up early. Usage of this phrasal verb is frequent in conversational settings and casual written communication, often found in discussions about leisure, relaxation, and personal routines. Given its informal nature, it is less likely to be utilized in formal writing or speech, where more straightforward terms like "oversleep" or "extend sleep" might be used instead. Despite its casual usage, "sleep in" is universally understood across different age groups and English-speaking regions.
B1
PreIntermediate
1. To stay in bed later in the morning than usual, often deliberately.
On weekends, I like to sleep in and catch up on rest.
Since it's a holiday tomorrow, let's sleep in and relax.
After the party, they decided to sleep in and skip breakfast.
He set no alarm to sleep in on his day off.
The kids love to sleep in when they're on vacation.