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Noun: insomniac  in'sóm-nee,ak
  1. Someone who cannot sleep
    - sleepless person
Adjective: insomniac  in'sóm-nee,ak
  1. Without or unable to sleep
    "insomniac old people";
    - sleepless, watchful

Derived forms: insomniacs

See also: awake

Type of: diseased person, sick person, sufferer

Encyclopedia: Insomniac