parasomnia

noun
para·​som·​nia | \ˌpar-ə-ˈsäm-nē-ə \

Medical Definition of parasomnia 

: any of various disorders of sleep characterized by abnormal behavioral or physiological activity (such as sleepwalking or night terrors) during sleep or in the transitional stage between sleep and wakefulness There is a group of phenomena known as parasomnias, unpleasant physical activities that can occur when someone is in twilight state between deep sleep and wakefulness.— H. Lee Kagan, Discover, December 2008 The REM parasomnias are harder to explain. One, called sleep paralysis, is so terrifying that it has been blamed for reports of demon visitations and alien abductions.— Ann Finkbeiner, New Scientist, 30 Nov. 2013

Learn More about parasomnia

Share parasomnia

Comments on parasomnia

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

WORD OF THE DAY

by force of circumstances

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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!