insomniac 1 of 2

adjective

in-ˈsäm-nē-ˌak How to pronounce insomniac (audio)
Definition of insomniacnext
as in wakeful
not sleeping or able to sleep an insomniac veteran tormented by his memories of the war

Synonyms & Similar Words

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Antonyms & Near Antonyms

insomniac

2 of 2

noun

as in riser

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of insomniac
Adjective
Even an insomniac film critic couldn’t see half of the films playing Fantasia 2025 during the three weeks of the festival. — Scott Phillips, Forbes.com, 6 Aug. 2025 The four-time Grammy winner dazzled exhibitors with a mini-concert at CinemaCon to jazz them up for the film, which follows a version of himself, an insomniac musician, who encounters a mysterious stranger. — Anthony D'alessandro, Deadline, 14 May 2025
Noun
And for a generation of insomniacs, nothing embodied the late-night spirit like Adult Swim. — Eric Vilas-Boas, Vulture, 18 Mar. 2026 Even for seasoned insomniacs, these changes can feel drastic. — Ellen O’Brien, SELF, 25 Feb. 2026 See All Example Sentences for insomniac
Recent Examples of Synonyms for insomniac
  1. wakeful
  2. riser
  3. awake
  4. sleepless
Adjective
  • In a previous university blog post, Majumdar compared this finding to the brain flushing out byproducts that build up during active, wakeful moments, allowing for a more restful night’s sleep.
    — Mack DeGeurin, Popular Science, 9 Sep. 2026
  • Low to medium doses show a reduction in the alpha frequency of brain waves (which correspond to relaxed and wakeful states), along with rising entropy, a signature finding of sober brains sinking deeper into a trip.
    — Oshan Jarow, Vox, 4 Nov. 2024
Definition of wakeful
Noun
  • For longer sessions, let a phone stand, laptop riser or external monitor do the lifting for you.
    — Ryan Brennan, Miami Herald, 8 Oct. 2026
  • The plant is an early riser in the spring, so clear away old foliage to prepare for new growth.
    — Marie Iannotti, The Spruce, 22 Sep. 2026
Definition of riser
Adjective
  • She was hospitalized and, as of Tuesday, was awake and speaking.
    — CBS News, CBS News, 7 Oct. 2026
  • In fact, even before the show actually starts, Bob can be exhausted, having been awake since some ridiculous hour.
    — Théoden Janes, Charlotte Observer, 7 Oct. 2026
Definition of awake
Adjective
  • Who hasn’t watched hours of Friends reruns with a bag of Cape Cod chips on a sleepless night?
    — Elizabeth Siegel, Allure, 2 Oct. 2026
  • That might mean more scans, more biopsies, more waiting rooms, more sleepless nights wondering if your body has somehow betrayed you.
    — Dr. Sanjay Gupta, CNN Money, 23 Sep. 2026
Definition of sleepless

Browse Nearby Words

insomnia
insomniac
insomniacs
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Cite this Entry

“Insomniac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insomniac. Accessed 11 Oct. 2026.

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