Medical Dictionary

1

insomniac

noun in·som·ni·ac \ -nē-ˌak \

medical Definition of insomniac

: one affected with insomnia

2

insomniac

adjective

medical Definition of insomniac

: affected with insomnia
  • an insomniac patient

Learn More about insomniac


Seen and Heard

What made you want to look up insomniac? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

having a quality expressive of sadness

Get Word of the Day daily email!

Test Your Vocabulary

February 2018 Words of the Day Quiz

  • a-dog-in-snow-jumping-to-grab-a-heart-shaped-balloon-the-snow-and-heart-balloon-indicate-that-the-month-being-represented-is-april-and-the-dog-is-just-kinda-cute
  • Which is a synonym of sanguine?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!