Definition of Somnolence

Reviewed on 3/29/2021

Somnolence: Sleepiness, the state of feeling drowsy, ready to fall asleep. A person experiencing somnolence is somnolent and is acting somnolently.

Somnolence, somnolent, and somnolently go back to the Latin "somnus" meaning (please don't yawn) "sleep."

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