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.

There’s surging power demand — mostly due to massive build-out in data centers to fuel AI — that’s upended a once sleepy corner of the market.

From MarketWatch • May 18, 2026

“When the house is winding down and the vibes are sleepy, the vibes are sleepy.”

From The Wall Street Journal • May 8, 2026

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

So he tried hard to stay awake, even though he was sleepy, because he knew this was important.

From "All About Sam" by Lois Lowry

sleepy

Example Sentences

Related Words