WordReference Random House Unabridged Dictionary of American English © 2020
in•som•ni•ac (in som′nē ak′),USA pronunciation n.WordReference Random House Learner's Dictionary of American English © 2020
- Physiologya person who suffers from insomnia.
- Physiologyhaving insomnia:a nervous, insomniac person.
- Physiologyof, pertaining to, or causing insomnia.
- insomni(a) + -ac 1905–10
in•som•ni•a /ɪnˈsɑmniə/USA pronunciation n. [uncountable]WordReference Random House Unabridged Dictionary of American English © 2020
- Pathologydifficulty in falling or staying asleep, esp. when habitual.
in•som•ni•a (in som′nē ə),USA pronunciation n.
- Pathology, Physiologyinability to obtain sufficient sleep, esp. when chronic;
difficulty in falling or staying asleep;
- Latin, equivalent. to insomn(is) sleepless (in- in-3 + somn(us) sleep + -is adjective, adjectival suffix) + -ia -ia
'insomniac' also found in these entries (note: many are not synonyms or translations):