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  1. Nightmare - Wikipedia

    A nightmare, also known as a bad dream, [1] is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also despair, anxiety, disgust or sadness. The dream may …

  2. 7 Reasons You’re Having Nightmares

    May 22, 2024 · What causes nightmares? “Most people have a random nightmare here or there, and you may be more susceptible to them after dealing with stress or watching a scary movie,” Dr. Tiani …

  3. Why We Have Nightmares (And How to Prevent Them)

    May 2, 2024 · It’s normal to occasionally have a nightmare or bad dream, but for some people, they recur frequently, disrupting sleep and negatively impacting their waking life as well.

  4. Nightmare | Definition, Causes, Prevention, & Facts | Britannica

    nightmare, disturbing dream that provokes a strong negative emotional reaction. Nightmares differ from other dreams in that they typically cause the sleeper to awaken because of emotional distress. An …

  5. Nightmare disorder - Symptoms and causes - Mayo Clinic

    Jun 5, 2021 · A nightmare is a disturbing dream associated with negative feelings, such as anxiety or fear that awakens you. Nightmares are common in children but can happen at any age.

  6. NIGHTMARE Definition & Meaning - Merriam-Webster

    It was not until the 16th century that the word nightmare came to mean "a frightening dream." This meaning probably came from the belief that such dreams were caused by evil spirits.

  7. Nightmares: Causes, Bad Dreams Signs, Warnings & Treatment

    What are nightmares and what do they mean? Nightmares are vividly realistic, disturbing dreams that can disturb sleep that can create fear, palpitations, and rapid breathing. Just like most dreams, …

  8. Nightmares - Psychology Today

    Apr 26, 2022 · Normally, people dream for more than two hours each night. Some of those dreams will be "bad dreams." These dreams may have disagreeable imagery or relate a story with a bad …

  9. Adult Nightmares: Causes and Treatments - WebMD

    Apr 30, 2025 · Nightmares are vividly realistic, disturbing dreams that rattle you awake from a deep sleep. They often set your heart pounding from fear. Nightmares tend to occur most often during …

  10. NIGHTMARE Definition & Meaning | Dictionary.com

    NIGHTMARE definition: a terrifying dream in which the dreamer experiences feelings of helplessness, extreme anxiety, sorrow, etc. See examples of nightmare used in a sentence.