Beauty-sleep meaning

A period of regular restful sleep, especially when attained by going to bed early.
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(idiomatic) Sleep before midnight, on the belief that early sleep hours conduce to health and beauty.
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Any extra sleep regarded as necessary to sustain a healthy, attractive appearance.
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Beauty sleep is defined as sleep before midnight, or any extra resting time.

An example of beauty sleep is falling asleep at 9 p.m.

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(idiomatic, sometimes humorous) Extra sleep or a special nap.
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Alternative spelling of beauty sleep.
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Origin of beauty-sleep

  • From the belief that such sleep helps preserve an attractive and youthful appearance

    From American Heritage Dictionary of the English Language, 5th Edition