Thesaurus.com
Dictionary.com
Definitions

sleepy

[slee-pee] / ˈsli pi /
ADJECTIVE
tired, dull
Synonyms
STRONGEST
drowsy lethargic listless quiet sluggish
WEAK
asleep blah comatose dopey dozy draggy heavy hypnotic inactive out out of it sleeping sleepyhead slow slumberous slumbersome snoozy somnolent soporific torpid yawning
Antonyms
STRONGEST
active alert energetic lively
WEAK
animated awake unsleepy

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.

Over the next few weeks, Roo became sleepy and lost his appetite.

From BBC • Apr. 16, 2026

Still, one of those threats—the ever-increasing demand for AI and the hope for even more—has push up usually sleepy utility stocks.

From Barron's • Apr. 14, 2026

Opening with “Catch These Fists,” the set seemed to wake up Coachella’s typically sleepy Sunday with a jolt of rock.

From Los Angeles Times • Apr. 13, 2026

They also rated how deeply they felt they had been sleeping and how sleepy they were.

From Science Daily • Mar. 26, 2026

One of the stray cats that Zohra feeds is curled up on the roof near the leg of my charpoy, asleep, but I’m not sleepy at all.

From "Amina's Song" by Hena Khan