Nightmare | Mean of nightmare in English Dictionary

/ˈnaɪtˌmeɚ/

• Noun
• a dream that frightens a sleeping person
1. Mommy, I had a really scary nightmare.
2. She had a recurring nightmare [=she had the same bad dream many times] about losing her job.
• a very bad or frightening experience or situation
1. The party was a complete nightmare.
2. a nightmare situation/scenario
3. Losing a child is every parent's worst nightmare. [=the thing every parent fears most]