insomnia

[ in-som-nee-uh ]
/ ɪnˈsɒm ni ə /

noun

inability to obtain sufficient sleep, especially when chronic; difficulty in falling or staying asleep; sleeplessness.

Origin of insomnia

1685–95; < Latin, equivalent to insomn(is) sleepless (in- in-3 + somn(us) sleep + -is adj. suffix) + -ia -ia

OTHER WORDS FROM insomnia

in·som·ni·ous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for insomnia

British Dictionary definitions for insomnia

insomnia
/ (ɪnˈsɒmnɪə) /

noun

chronic inability to fall asleep or to enjoy uninterrupted sleepRelated adjective: agrypnotic

Derived forms of insomnia

insomnious, adjective

Word Origin for insomnia

C18: from Latin, from insomnis sleepless, from somnus sleep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for insomnia

insomnia
[ ĭn-sŏmnē-ə ]

n.

Chronic inability to fall asleep or remain asleep for an adequate length of time.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for insomnia

insomnia
[ ĭn-sŏmnē-ə ]

Chronic inability to fall asleep or remain asleep for an adequate length of time.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for insomnia

insomnia
[ (in-som-nee-uh) ]

A persistent and prolonged inability to sleep.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.