Liberal Dictionary English Dictionary
noun
- inability to obtain sufficient sleep, especially when chronic; difficulty in falling or staying asleep; sleeplessness.
noun
- chronic inability to fall asleep or to enjoy uninterrupted sleepRelated adjective: agrypnotic
1620s, insomnie, from Latin insomnia “want of sleep,” from insomnis “sleepless,” from in- “not” (see in- (1)) + somnus “sleep” (see Somnus). The modern form is from 1758.
n.
- Chronic inability to fall asleep or remain asleep for an adequate length of time.
- Chronic inability to fall asleep or remain asleep for an adequate length of time.
A persistent and prolonged inability to sleep.