in·​som·​nia | \ in-ˈsäm-nē-ə How to pronounce insomnia (audio) \

Definition of insomnia

: prolonged and usually abnormal inability to get enough sleep

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Other Words from insomnia

insomniac \ in-​ˈsäm-​nē-​ˌak How to pronounce insomniac (audio) \ adjective or noun

Synonyms for insomnia


sleeplessness, wakefulness

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Examples of insomnia in a Sentence

has suffered from insomnia virtually his entire life

Recent Examples on the Web

In one small study, women 50 years and older with insomnia drank eight ounces of either tart cherry juice or a placebo in the morning and one to two hours before bed. Cynthia Sass, Mph,, "7 Healthy Late-Night Snacks," 3 July 2019 Nor does the Hims ad for sildenafil mention side effects including low blood pressure, loss of vision or hearing, headaches, or insomnia. Nicholas Thompson, WIRED, "Health Brands Hims and Hers Flout Facebook’s Rules on Drug Ads," 1 July 2019 Ocushield, a blue light screen protector company, suggests filters should be used as a preventative measure to avoid eye strain and insomnia. Madeline Purdue, USA TODAY, "Do blue light glasses actually work? Everything you need to know before you buy a pair," 21 June 2019 But, with Tori serving up dubious looks at the local Trader Joe’s, Madeline’s newfound insomnia is very, very appropriate. Ariana Romero,, "Here's Why Madeline Should Be Worried After That Big Little Lies Season 2 Premiere," 10 June 2019 Fatigue and remorse and horror, insomnia that the lighthouse was haunting in silence. Benjamin Moser, Harper's magazine, "The Indirect World," 10 Apr. 2019 After the birth of her second daughter, Cohen went through a period of anxiety and insomnia. Martina Schimitschek, San Diego Union-Tribune, "Crafts with succulents — on a miniature scale," 20 June 2019 Chronic pain was the most common symptom reported, followed by anxiety, PTSD, depression and insomnia. Nick Ibarra, The Mercury News, "Study finds California veterans use cannabis to replace other drugs," 18 June 2019 The board voted against adding opioid use disorder, depression and insomnia as qualifying conditions, which the physician panel did not recommend after hearing from experts. USA TODAY, "Pride pickup, sphinx on move, Tony Stark’s cabin: News from around our 50 states," 13 June 2019

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

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First Known Use of insomnia

circa 1623, in the meaning defined above

History and Etymology for insomnia

Latin, from insomnis sleepless, from in- + somnus sleep — more at somnolent

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Statistics for insomnia

Last Updated

9 Jul 2019

Look-up Popularity

Time Traveler for insomnia

The first known use of insomnia was circa 1623

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More Definitions for insomnia



English Language Learners Definition of insomnia

: the condition of not being able to sleep


in·​som·​nia | \ in-ˈsäm-nē-ə How to pronounce insomnia (audio) \

Kids Definition of insomnia

: difficulty in sleeping


in·​som·​nia | \ in-ˈsäm-nē-ə How to pronounce insomnia (audio) \

Medical Definition of insomnia

: prolonged and usually abnormal inability to obtain adequate sleep

called also agrypnia

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Comments on insomnia

What made you want to look up insomnia? Please tell us where you read or heard it (including the quote, if possible).


to form ideas or theories about something

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