sleepless

[ sleep-lis ]
/ ˈslip lɪs /

adjective

without sleep: a sleepless night.
watchful; alert: sleepless devotion to duty.
always active: the sleepless ocean.

QUIZZES

WHO SAID IT: A QUIZ ON PRESIDENTIAL WIT AND WISDOM

Think you know your presidents? Take this quiz and see if you can match the style, wit, and ideology of these memorable lines to the right POTUS.
Question 1 of 9
“I do believe that the buck stops here, that I cannot rely upon public opinion polls to tell me what is right. I do believe that right makes might and that if I am wrong, 10 angels swearing I was right would make no difference.”

Origin of sleepless

late Middle English word dating back to 1375–1425; see origin at sleep, -less

OTHER WORDS FROM sleepless

sleep·less·ly, adverbsleep·less·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for sleepless

British Dictionary definitions for sleepless

sleepless
/ (ˈsliːplɪs) /

adjective

without sleep or resta sleepless journey
unable to sleep
always watchful or alert
mainly poetic always active or movingthe sleepless tides

Derived forms of sleepless

sleeplessly, adverbsleeplessness, noun
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