- sleep before midnight, assumed to be necessary for one's beauty.
- any extra sleep.
Origin of beauty sleep
First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for beauty sleep
If this mad scheme comes off you will need your beauty-sleep with a vengeance!Joan of the Sword Hand
S(amuel) R(utherford) Crockett
But there must be no beauty-sleep for the tired young girl who plied her needle.Kidnapped at the Altar
Laura Jean Libbey
You want your beauty-sleep, and you wont get it unless you are quick.A Very Naughty Girl
L. T. Meade
But we must be trotting, Mrs. Frampton, or we shall miss our beauty-sleep.Non-combatants and Others
To rob you of your beauty-sleep with "Guard to-morrow night!"
- 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