insomniac

adjective
in·​som·​ni·​ac | \ in-ˈsäm-nē-ˌak How to pronounce insomniac (audio) \

Definition of insomniac

 (Entry 1 of 2)

: of, relating to, characterized by, or affected with insomnia insomniac nights insomniac tendencies … he lived for several months with an older brother who didn't enforce bedtime rules. Joe started exchanging text messages with an insomniac friend and played online games against opponents on the other side of the planet.— John Cline The last thing my sisters and I would do on Christmas Eve—before retiring to our separate rooms and our private paroxysms of insomniac anticipation—was make sure our parents had put out cookies for Santa Claus.— Christopher Caldwell

insomniac

noun
plural insomniacs

Definition of insomniac (Entry 2 of 2)

: a person affected with insomnia Many insomniacs develop anxiety about going to bed and they fear sleeplessness, which can worsen insomnia.— Andrew Weil

First Known Use of insomniac

Adjective

1877, in the meaning defined above

Noun

1879, in the meaning defined above

History and Etymology for insomniac

Adjective

from attributive use of insomniac entry 2

Noun

insomnia + -ac

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The first known use of insomniac was in 1877

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Cite this Entry

“Insomniac.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insomniac. Accessed 11 Apr. 2021.

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More Definitions for insomniac

insomniac

noun

English Language Learners Definition of insomniac

: a person who is not able to sleep : a person with insomnia

insomniac

noun
in·​som·​ni·​ac | \ -nē-ˌak How to pronounce insomniac (audio) \

Medical Definition of insomniac

 (Entry 1 of 2)

: one affected with insomnia

insomniac

adjective

Medical Definition of insomniac (Entry 2 of 2)

: affected with insomnia an insomniac patient

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Britannica English: Translation of insomniac for Arabic Speakers

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