somnolent
Americanadjective
-
sleepy; drowsy.
- Synonyms:
- slumberous
-
tending to cause sleep.
- Synonyms:
- soporific, somniferous
adjective
-
drowsy; sleepy
-
causing drowsiness
Other Word Forms
Etymology
Origin of somnolent
1425–75; late Middle English sompnolent < Old French < Latin somnolentus, derivative of somnus sleep; see -ulent
Compare meaning
How does somnolent compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
If you're somnolent, you're feeling sleepy or drowsy. It's best to avoid operating speedboats or motorcycles when you're somnolent. Somnolent comes from the Latin word somnolentia, meaning "sleepiness," which in turn is from the Latin root somnus, for "sleep." You can feel somnolent, or describe something as being somnolent. Something described as somnolent is likely to induce sleep, like a boring movie in an overheated theater, or the low, somnolent lighting in a museum exhibit of fragile, old manuscripts.
Vocabulary lists containing somnolent
"The Ransom of Red Chief" by O. Henry
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
Miss Peregrine's Home for Peculiar Children
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
In Cold Blood
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Exoprojection in which the somnolent user is able to assume a conscious awareness of an ideal reality from the past.
From The Wall Street Journal • Mar. 23, 2026
Amid skepticism that he couldn’t coach at the higher level, Jackson tore the program down to the studs, brought in 86 new players, and blanketed the somnolent program with passion and positivity.
From Los Angeles Times • Oct. 29, 2023
Telfaz11 started out on YouTube, where its videos hooked young Saudis looking for a hip alternative to the somnolent broadcast television.
From New York Times • Dec. 27, 2021
There is a rather famous account of a World War I pilot who reported finding himself floating through a school of apparently somnolent swifts high above the clouds.
From Washington Post • Oct. 15, 2021
There are three Smart Aids in Englewood, the small, somnolent beach town where I live.
From "Miss Peregrine's Home for Peculiar Children" by Ransom Riggs
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.