Found 2 items, similar to sleeplessness.
English → English (WordNet) Definition: sleeplessness sleeplessness n : a temporary state in which you are unable (or unwilling) to sleep [syn: wakefulness] [ant: sleepiness]
English → English (gcide) Definition: Sleeplessness Sleepless \Sleep"less\, a. 1. Having no sleep; wakeful. [1913 Webster] 2. Having no rest; perpetually agitated. “Biscay's sleepless bay.” --Byron. [1913 Webster] -- Sleep"less*ly, adv. -- Sleep"less*ness, n. [1913 Webster]