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sleep debt

American

[sleep det] / ˈslip ˌdɛt /

noun

the difference between the amount of sleep a person needs and the actual amount of time spent sleeping, when the amount needed exceeds the time slept.

The cumulative effect of sleep debt—over days, weeks, or longer—can be linked to a number of physical, emotional, and cognitive impairments.

Etymology

Origin of sleep debt

First recorded in 1930–35

Example Sentences

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sleep debt

Trackers can also spot broader trends, such as sleep debt or accumulated stress that can affect long-term health.

From The Wall Street Journal ● Aug. 9, 2026

Many U.S. teens accumulate sleep debt during the school week as they juggle academic demands, social activities, extracurricular commitments, and in many cases part-time jobs.

From Science Daily ● Jan. 7, 2026

Alex's sleep debt quickly accumulated and began to affect her mental health as she blamed herself for not getting her son to sleep the way the courses said he would, or could.

From Salon ● May 12, 2023

Get that shut-eye: The sleep debt collectors are coming.

From New York Times ● Jul. 2, 2022

It must be the sleep debt I owe my body—the accumulated hours of missed rest over the past four days.

From "Dry" by Neal Shusterman and Jarrod Shusterman

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023