WordReference Random House Unabridged Dictionary of American English © 2017
in•som•ni•ac  (in somnē ak′),USA pronunciation n. 
  1. Physiologya person who suffers from insomnia.

adj. 
  1. Physiologyhaving insomnia:a nervous, insomniac person.
  2. Physiologyof, pertaining to, or causing insomnia.
  • insomni(a) + -ac 1905–10

WordReference Random House Learner's Dictionary of American English © 2017
in•som•ni•a /ɪnˈsɑmniə/USA pronunciation   n. [uncountable]
  1. Pathologydifficulty in falling or staying asleep, esp. when habitual.
in•som•ni•ac /ɪnˈsɑmniˌæk/USA pronunciation  n.[countable]adj. 

WordReference Random House Unabridged Dictionary of American English © 2017
in•som•ni•a  (in somnē ə),USA pronunciation n. 
  1. Pathology, Physiologyinability to obtain sufficient sleep, esp. when chronic;
    difficulty in falling or staying asleep;
    sleeplessness.
in•somni•ous, adj. 
  • Latin, equivalent. to insomn(is) sleepless (in- in-3 + somn(us) sleep + -is adjective, adjectival suffix) + -ia -ia
  • 1685–95

'insomniac' also found in these entries:
Advertisements

Word of the day: call | frame

Advertisements

Report an inappropriate ad.
Become a WordReference Supporter to view the site ad-free.