Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The property of being sleepless.

from The Century Dictionary and Cyclopedia

  • n. Lack or deprivation of sleep; inability to sleep; morbid wakefulness, technically called insomnia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a temporary state in which you are unable (or unwilling) to sleep

Etymologies

sleepless +‎ -ness (Wiktionary)

Examples

Wordnik is becoming a not-for-profit! Read our announcement here.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.