a terrifying dream in which the dreamer experiences feelings of helplessness, extreme anxiety, sorrow, etc.
a condition, thought, or experience suggestive of a nightmare:
the nightmare of his years in prison.
(formerly) a monster or evil spirit believed to oppress persons during sleep.
a terrifying or deeply distressing dream
a thing that is feared
(formerly) an evil spirit supposed to harass or suffocate sleeping people
late 13c., “an evil female spirit afflicting sleepers with a feeling of suffocation,” compounded from night + mare (3) “goblin that causes nightmares, incubus.” Meaning shifted mid-16c. from the incubus to the suffocating sensation it causes. Sense of “any bad dream” first recorded 1829; that of “very distressing experience” is from 1831. Cognate with Middle Dutch nachtmare, German Nachtmahr.
nightmare night·mare (nīt’mâr’)
- Nightmare file system
Pejorative hackerism for Sun’s Network File System (NFS). In any nontrivial network of Suns where there is a lot of NFS cross-mounting, when one Sun goes down, the others often freeze up. Some machine tries to access the down one, and (getting no response) repeats indefinitely. This causes it to appear dead to some messages […]
[nahyt-mair-ish] /ˈnaɪtˌmɛər ɪʃ/ adjective 1. resembling a , especially in being terrifying, exasperating, or the like: his nightmarish experience in a concentration camp. adj. 1834, from nightmare + -ish. Related: Nightmarishly; nightmarishness.
noun 1. .
[interjection nahyt-nahyt, -nahyt; adverb nahyt-nahyt] /interjection ˈnaɪtˈnaɪt, -ˌnaɪt; adverb ˈnaɪtˌnaɪt/ interjection 1. Informal. good night. Idioms 2. go night-night, Baby Talk. to go to bed or to sleep. sentence substitute 1. an informal word for good night nursery talk, “good-night,” 1896; form nighty-night is attested from 1876. interjection An amiable parting salutation at night (1896+)