MSN home
Mail
My MSN
encarta
greeting cards
encarta
®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
inspect
inspection
inspection arms
inspector
inspector general
inspectorate
insphere
inspiration
inspirator
inspiratory
inspire
inspired
inspiring
inspirit
inspissate
Inst.
inst.
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
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
MSN Privacy
Legal
Advertise
Feedback
Help
© 2009 Microsoft