English dictionary

nightmare

/'n/aI/tm/(@)/r/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

a situation resembling a terrifying dream

noun.state

Synonyms incubus

Source: WordNet 3.0
a terrifying or deeply upsetting dream

noun.cognition

Source: WordNet 3.0
A fiend or incubus formerly supposed to cause trouble in sleep.

noun

Source: webster1913