- nightmare⇄adj. like a nightmare; nightmarish.
Ex. a nightmare voyage across the ocean. ""For twelve hours I inhabited a nightmare world in which I experienced the torments of hell"" (Maclean's). - nightmare⇄nightmare, noun, adjective.
- nightmare⇄noun 1. a very distressing dream; dream causing fear or anxiety.
Ex. I would find myself plunged ... in some foul and ominous nightmare, from which I would awake strangling (Robert Louis Stevenson).
2. (Figurative.) a very distressing experi