Used to denote a dream anxiety attack, not a sleep (night) terror. In the past-and still in the European sleep literature-nightmare is used to indicate both sleep terror and anxiety dream.

Nightmares are dreams that usually occur in the last three hours of sleep during a REM period. Nightmares are terrifying dreams in which our worst fears are brought to life in convincing detail.  Nightmares are almost always long and intense.  Some people may wake up after a nightmare in a cold sweat and can sometimes keep people from getting a good nights sleep.  But as all problem dreams they can be overcome by facing up to what they can mean in your life.

unpleasant and/or frightening dream occurring in REM sleep (different from a night terror)

Immortal sleeper who kills twilights in the Morpheum.

frightening dream causing the individual to wake up; occurs during REM sleep.

a situation resembling a terrifying dream

a terrifying or deeply upsetting dream

a concrescence of our most private terrors

a disturbing dream that causes the dreamer to wake up feeling anxious and frightened

a dream in which you, the dreamer, are not in control

a dream occurring during rapid eye movement (REM) sleep that arouses feelings of intense, inescapable fear, terror, distress, or extreme anxiety that usually awakens the sleeper

a dream occurring during rapid eye movement (REM) sleep that brings out feelings of

a dream occurring during rapid eye movement (REM) sleep that results in feelings of inescapable terror, fear or extreme anxiety

a dream of particular intensity and with content that the sleeper finds disturbing

a long, frightening dream, accompanied by unpleasant and vivid emotions, such as fear, horror or desperation, and is common among individuals at any age

an unpleasant or scary dream

a pun relating to the word we use for a scary dream

a scary dream that completely wakes up a child after he has been asleep for a while

a story, a bad dream, she says

a very distressing dream which usually forces at least partial awakening

a very distressing dream which usually forces at least partialawakening

a very scary thing for any of us

a vivid, frightening dream that usually results in the dreamer waking up with full or partial recall of the dream itself

A frightening dream that can cause an individual to wake up. Nightmares typically occur during REM sleep.

a sleep-disrupting dream that is often recalled in detail. An anxiety-filled dream that often wakes the sleeper from REM sleep. It is distinguished from "sleep terror," which is sudden, partial arousal from NREM sleep that may cause the sleeper to cry out in fright but that seldom includes vivid images.

unpleasant and/or frightening dream that usually awakens the sleeper. Unlike night terrors, nightmares occur during REM sleep.

A bad dream, the contents of which arouse fear, anxiety, or dread.

Used to denote an unpleasant and frightening dream that usually occurs in REM sleep. Occasionally called a dream anxiety attack, not a sleep (night) terror. Nightmare in the past has been used to indicate both sleep terror and anxiety dream attacks.

Unusual to dream of having a nightmare but it is a sign of future troubles that you have never experienced before.

a frightening REM dream. (208)

To dream of having a nightmare is very rare and suggests you probably have some deep seated fears.

Nightmares are scary dreams. Nightmares awake the children and make them afraid to go back to sleep. One out of every 4 children has nightmares more than once a week. Nightmares may happen for no known reason, but sometimes occur when your child has seen or heard things that upset him/her. Most nightmares happen very late in the sleep period (usually between 4 a.m. and 6 a.m.).

An unpleasant and/or frightening dream that usually awakens a person from REM sleep. Occasionally called a dream anxiety attack, it is not synonymous with a night (sleep) terror.

In common current usage, the term nightmare refers to dreams of particular intensity, with content that the sleeper finds disturbing, related either to physiological causes, such as a high fever, or to psychological ones, such as unusual trauma or stress in the sleeper's life. The occasional body movements seen in nightmares may have a use in awakening the sleeper, thus helping to avoid the frightening dream-situation.

"Nightmare" is an episode of the original The Outer Limits television show. It first aired on 2 December, 1963, during the first season.

"Nightmare" is an episode of The Outer Limits television show. It was first broadcast on Friday August 14 of 1998, during the fourth season. It is a remake of "Nightmare" (1963), an episode of the original series.

"Nightmare" is episode fourteen of the first season of the television series Supernatural. This episode deals with telekinesis and clairvoyance.