noun
sleepiness
SLEE-pee-nis
Sleepiness (noun) means the state of feeling ready to fall asleep. Example: “A wave of sleepiness came over her after lunch.”
noun
1
The state of feeling ready to fall asleep.
"A wave of sleepiness came over her after lunch."
"He fought off sleepiness to finish the drive home."
"The medication can cause sleepiness as a side effect."
How to use sleepiness
Learner’s notesIn plain EnglishSleepiness is just the feeling of being sleepy.
When to use it
It is a plain, everyday word suitable for any setting, including medical contexts.
Memory tip
Remember it simply adds -ness to the adjective sleepy to make a noun.
Trace the full origin ↓
Common pairings
a wave of sleepiness
fight off sleepiness
daytime sleepiness
feelings of sleepiness
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A wave of _____ came over her after lunch.
Etymology
Sleepiness is formed from the English word sleepy with the suffix -ness added to turn it into a noun.
Synonyms
View more →Antonyms
Related words
Rhymes for sleepiness
business
ugliness
laziness
holiness
happiness
craziness
weariness
readiness
emptiness
manliness
dizziness
tardiness
See all rhymes for sleepiness →
Frequently asked questions
What does sleepiness mean?
It means the feeling of being sleepy, or ready to fall asleep.
What causes sleepiness during the day?
Common causes include not getting enough sleep, eating a heavy meal, or side effects of certain medications.
Is sleepiness the same as tiredness?
They are closely related, but sleepiness specifically means feeling like you could fall asleep, while tiredness can also refer to general fatigue without wanting to sleep.
What is the meaning of sleepiness?
"sleepiness" (noun) means the state of feeling ready to fall asleep.
