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. …

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.

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.

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 …

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 …

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 …

Nightmare disorder is a pattern of repeated frightening and vivid dreams that affects your quality of life. It ranges from mild to severe and can be short-term or chronic.

night•mare (ˈnaɪtˌmɛər) n. 1. a terrifying dream producing feelings of extreme fear and anxiety. 2. a condition, thought, or experience suggestive of a nightmare. 3. (formerly) a monster or evil …

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.

NIGHTMARE definition: 1. a very upsetting or frightening dream: 2. an extremely unpleasant event or experience or…. Learn more.