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insomnia

insomnia Insomnia is sleeplessness or difficulty sleeping.

Insomnia is sleeplessness or difficulty sleeping. It can mean a marked shortfall from a person’s usual sleep, most often used for a more lasting problem, and may involve poor quality of sleep as well as too little sleep.

Also see

Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Insomnia” (Insomnia).
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Cite this entry

PsychTerms (psychterms.org), CC BY 4.0, version 1. “insomnia.” Development preview.

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