The phrasal verb "sleep on" is predominantly used in informal speech and writing. It generally means to take time, often overnight, to consider something carefully before making a decision. This usage pattern suggests that one should not act or decide impulsively but rather allow time for subconscious processing. Common contexts include decision-making in both personal and professional situations, such as "Let me sleep on it; I'll give you an answer tomorrow." Such usage implies a thoughtful approach, where the speaker values making a well-considered decision. While not commonly found in formal legal or academic texts, the phrase can appear in semi-formal contexts, like business discussions, reflecting a more considerate approach to solving problems or making choices.
B1
PreIntermediate
1. To wait until the following day before making a decision.
I can't decide right now; I'll sleep on it and let you know tomorrow.
She decided to sleep on the job offer before giving her final answer.
When faced with a tough choice, I always prefer to sleep on it for fresh perspective in the morning.