insomnia

[ in-som-nee-uh ]
/ ɪnˈsɒm ni ə /

noun

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

Nearby words

  1. insoluble,
  2. insolvable,
  3. insolvency,
  4. insolvency provision,
  5. insolvent,
  6. insomniac,
  7. insomnolence,
  8. insomuch,
  9. insomuch as,
  10. insorption

Origin of insomnia

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

Related formsin·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 Formsinsomnious, 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

Word Origin and History for insomnia

insomnia

n.

1620s, insomnie, from Latin insomnia "want of sleep," from insomnis "sleepless," from in- "not" (see in- (1)) + somnus "sleep" (see Somnus). The modern form is from 1758.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine 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.

Science 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.

Culture 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.