slow-wave sleep

noun

Definition of slow-wave sleep

: the phase of non-REM sleep marked by the deepest sleep and the highest levels of delta wave activity with brain and muscle activity significantly reduced, loss of response to external stimuli greatest, and with heart rate and respiration at lowest levels

Note: Sleep time spent in slow-wave sleep is of longer duration during infancy and childhood.

Deep, or slow-wave sleep, when the body secretes human growth hormone, is critical for development and physical repair.— Melinda Beck Members of a second group were awakened every time they entered slow-wave sleep, a stage when dreams tend not to occur.— Sandra Blakeslee abbreviation SWS

Examples of slow-wave sleep in a Sentence

Recent Examples on the Web The researchers say the association between the issues and your optimal sleep time may have something to do with slow-wave sleep. Joshua Hawkins, BGR, 5 May 2022 Waking up during slow-wave sleep, which makes up the majority of your 1.5- to 2-hour sleep cycles, can leave you feeling groggy the next day. Amanda Macmillan, Outside Online, 30 Dec. 2014 That prepares you for the next stage -- a deep, slow-wave sleep, also known as delta sleep. Sandee Lamotte, CNN, 12 Jan. 2022 One study found the pink noise cocktail increased deep or slow-wave sleep and improved memory in a few people with existing cognitive impairment, but the results were much stronger in cognitively healthy adults in their 70s. Sandee Lamotte, CNN, 3 May 2021 One study found the pink noise cocktail increased deep or slow-wave sleep and improved memory in a few people with existing cognitive impairment, but the results were much stronger in cognitively healthy adults in their 70s. Sandee Lamotte, CNN, 3 May 2021 One study found the pink noise cocktail increased deep or slow-wave sleep and improved memory in a few people with existing cognitive impairment, but the results were much stronger in cognitively healthy adults in their 70s. Sandee Lamotte, CNN, 3 May 2021 One study found the pink noise cocktail increased deep or slow-wave sleep and improved memory in a few people with existing cognitive impairment, but the results were much stronger in cognitively healthy adults in their 70s. Sandee Lamotte, CNN, 3 May 2021 One study found the pink noise cocktail increased deep or slow-wave sleep and improved memory in a few people with existing cognitive impairment, but the results were much stronger in cognitively healthy adults in their 70s. Sandee Lamotte, CNN, 3 May 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'slow-wave sleep.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of slow-wave sleep

1964, in the meaning defined above

Buying Guide

Our Reviews team has selected the best bedsheets.

Learn More About slow-wave sleep

Time Traveler for slow-wave sleep

Time Traveler

The first known use of slow-wave sleep was in 1964

See more words from the same year

Dictionary Entries Near slow-wave sleep

slow-walk

slow-wave sleep

slow-witted

See More Nearby Entries 

Statistics for slow-wave sleep

Last Updated

10 May 2022

Cite this Entry

“Slow-wave sleep.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/slow-wave%20sleep. Accessed 20 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for slow-wave sleep

slow-wave sleep

noun

Medical Definition of slow-wave sleep

: the phase of non-REM sleep marked by the deepest sleep and the highest levels of delta wave activity with brain and muscle activity significantly reduced, loss of response to external stimuli greatest, and with heart rate and respiration at lowest levels

Note: Sleep time spent in slow-wave sleep is of longer duration during infancy and childhood.

Members of a second group were awakened every time they entered slow-wave sleep a stage when dreams tend not to occur.— Sandra Blakeslee abbreviation SWS

WORD OF THE DAY

Test Your Vocabulary

Name That Color

  • a light greenish blue color
  • Name that color:
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!