Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Somnolence
Medically reviewed by Min Clinic Staff | Updated: January 2026
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."