sleepy

adjective

ˈslē-pē 

sleepier; sleepiest

1

a

: ready to fall asleep

b

: of, relating to, or characteristic of sleep

2

: sluggish as if from sleep : lethargic

also : having little activity

a sleepy coastal village

3

: sleep-inducing

sleepily

ˈslē-pə-lē 

adverb

sleepiness

ˈslē-pē-nəs 

noun

Synonyms of sleepy

• sleeping
• resting
• drowsy

Examples of sleepy in a Sentence

She felt sleepy and went to bed.

the sleepy children were carried up to bed

Recent Examples on the Web

What was once a boring, sleepy issue where the PUC made decisions more or less in a vacuum is no longer the case. — Jordan Blum, Fortune, 18 Oct. 2026

First out of Cannes, where Bola Negra livened up a sleepy year on the Croisette before being snapped up by Netflix. — Nate Jones, Vulture, 16 Oct. 2026

The trailer begins as Ziegler’s Mae frantically asks family friend Benny, played by a sleepy Rob Lowe, for help after her big mistake — kissing the wrong brother between Graham Phillips’ Andrew and Elias Kacavas’ Theo. — Nicole Fell, HollywoodReporter, 15 Oct. 2026

The company is already studying ways to manipulate orexin activity in another form of narcolepsy, and a condition in which people feel excessively sleepy during the day, even after a full night’s sleep. — Alice Park, Time, 15 Oct. 2026

Word History

First Known Use

13th century, in the meaning defined at sense 1a

Rhymes for sleepy

• creepy
• principe

Kids Definition

sleepy

adjective

ˈslē-pē 

sleepier; sleepiest

1

: ready to fall asleep

2

: quietly inactive

a sleepy village

sleepily

-pə-lē 

adverb

sleepiness

-pē-nəs 

noun

Medical Definition

sleepy

adjective

ˈslē-pē 

sleepier; sleepiest

: ready to fall asleep

sleepiness

-pē-nəs 

noun