to sleep on the idea
- idiom
- - Let's say I'll sleep on the idea.
Examples
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Before making any commitments, I decided to sleep on the idea and see how I felt in the morning.
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I came back for it after I'd slept on the idea.
Blog text (3) -
She told me to sleep on the idea so I could think about it clearly after a good night's rest.
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After discussing the project, my manager advised me to sleep on the idea before we made any final decisions.
Synonyms
To look at all the details and what may happen before you decide
Think carefully for a long time before making a decision
Delay making a decision about something while thinking about it
To delay making a decision until the next day to think about it
To think carefully about something before deciding
To think carefully about something for a while before deciding
Delay making a decision by waiting instead of choosing
Delay talking about an idea until later
To delay action or decisions until things become clearer
Antonyms
How Soon
Surface Forms
Morphology
The literal constituents give a clear clue: 'sleep' implies letting time pass and 'on' links that action to the 'idea', so a learner could plausibly infer that you should postpone dealing with the idea until after sleeping. However, the phrase is a conventionalized idiom (cf. 'sleep on it') and the specific sense 'delay decision until the next day' is metaphorical and conventional rather than fully compositional, so it is not completely predictable without exposure.
Etymology
The phrase sleep on the idea comes from the simple image of putting an idea aside and literally sleep on it overnight so your mind can rest. That's why it means 'to delay deciding until after you have thought about it the next day'.