Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
inshore
inshrine
inside
inside address
inside forward
inside information
inside job
inside lane
inside-out roll
Inside Passage
inside quote
inside spread
inside track
insider
insider-outsider theory
insider trading
insidious
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

insomnia

in·som·ni·a [ in sómnee ə ]


noun 
Definition:
 
difficulty in sleeping: inability to fall asleep or to remain asleep long enough to feel rested, especially when this is a problem that continues over time

[Early 17th century. < Latin< insomnis "sleepless" < somnus "sleep"]

in·som·ni·ac adjective, noun
Advertisement

© 2009 Microsoft