Insomnia

Pronunciation

Origin

From Latin -("without") + somnus("sleep") + -.

Full definition of insomnia

Noun

insomnia

(countable and uncountable; plural insomnias)

A sleeping disorder that is known for its symptoms of unrest and the inability to sleep.

Derived terms

insomniac

Synonyms

sleeplessness

Related terms

hypersomnia