Habitual sleeplessness; inability to sleep.
More example sentences
- Fact sheets are on topics such as restless legs syndrome, insomnia, and sleep apnoea.
- Now stress and anxiety are obvious factors in causing insomnia but insomnia is insidious.
- So you need to get checked out by a good doctor who knows something about sleep and insomnia.
early 17th century: from Latin, from insomnis 'sleepless', from in- (expressing negation) + somnus 'sleep'.