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Synonyms

nightmare

American  
[nahyt-mair] / ˈnaɪtˌmɛər /

noun

  1. a terrifying dream in which the dreamer experiences feelings of helplessness, extreme anxiety, sorrow, etc.

    Synonyms:
    phantasmagoria
  2. a condition, thought, or experience suggestive of a nightmare.

    the nightmare of his years in prison.

  3. (formerly) a monster or evil spirit believed to oppress persons during sleep.


nightmare British  
/ ˈnaɪtˌmɛə /

noun

  1. a terrifying or deeply distressing dream

    1. an event or condition resembling a terrifying dream

      the nightmare of shipwreck

    2. ( as modifier )

      a nightmare drive

  2. a thing that is feared

  3. (formerly) an evil spirit supposed to harass or suffocate sleeping people

"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

Usage

Where does the word nightmare come from? Nightmares are scary and unpleasant. But you can rest easy knowing that the fascinating origin of the word nightmare makes it clear humans have been having them for hundreds of years.In Old English, a mare was a kind of evil or cursed spirit. Mares appear in all kinds of folklore, including German and Slavic stories. Mares were said to ride on people's chests at night, causing suffocation and bad dreams. These mares, often female, were known as nightmares (because they came at night).By the 16th century, the word nightmare came to refer to a sensation of suffocation or anxiety during sleep, and now simply a bad dream. While nightmares are terrifying, there is good news: at least most of us don't worry about evil spirits trying to suffocate us in our sleep anymore.The roots of these other words may get a rise—of laughter or surprise—out of you. Run on over to our roundup of them at "Weird Word Origins That Will Make Your Family Laugh."

Related Words

See dream.

Other Word Forms

  • nightmarish adjective
  • nightmarishly adverb
  • nightmarishness noun

Etymology

Origin of nightmare

Middle English word dating back to 1250–1300; night, mare 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"I have been living in a nightmare... I feel like I'm a shell of the person that I used to be."

From BBC

“This was supposed to be the place where you have freedom to live without fear … but it’s sort of turning into that nightmare again,” Harman Singh said.

From Los Angeles Times

"I couldn't imagine I would lose my daughter here. It's just a nightmare," mother Valentyna told reporters ahead of the funeral.

From Barron's

He says finding a job is an "absolute nightmare".

From BBC

He said he still had vivid nightmares and was unable to go into large crowds.

From BBC