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Definitions

sleepless

[sleep-lis] / ˈslip lɪs /
ADJECTIVE
insomniac, restless
Synonyms
STRONGEST
fidgety
WEAK
active alert antsy anxious bustling edgy fidgeting jumpy nervous on edge strung-out tossing and turning troubled unsettled wakeful wide-awake wired worried

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Francisco Gonzalez, a 79-year-old retiree, also said he had a sleepless night in the dark, "sitting in an armchair at home, waiting for the power to come back on."

From Barron's • Mar. 22, 2026

Speaking to BBC Newsday Moroccan journalist Jalal Bounour said that it was "a sleepless night as fans welcomed the news with great excitement and joy".

From BBC • Mar. 18, 2026

They simply show that a disciplined, diversified approach offers something rare in investing: higher odds of success with fewer sleepless nights.

From MarketWatch • Feb. 5, 2026

But it is the opposite scenario—losing the AI race—that is giving them more sleepless nights these days.

From The Wall Street Journal • Jan. 16, 2026

I’m in an endless blur of exhausted days and sleepless nights.

From "The Running Dream" by Wendelin Van Draanen