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beauty sleep

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noun Informal.

sleep before midnight, assumed to be necessary for one's beauty.
any extra sleep.

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Origin of beauty sleep

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use beauty sleep in a sentence

British Dictionary definitions for beauty sleep

beauty sleep

noun

informal sleep, esp sleep before midnight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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