Dictionary

noun

Definitions

1. An evil spirit supposed to oppress people while asleep, especially to have sex with women as they sleep.

   Antonyms:succubus

2. A feeling of oppression during sleep, sleep paralysis; night terrors, a nightmare.

   Synonyms:nightmare

3. (by extension) Any oppressive thing or person; a burden.

4. One of various of parasitic insects, especially subfamily Aphidiinae.