incubus

in·cu·bus

noun \ˈiŋ-kyə-bəs, ˈin-\

plural in·cu·bi\-ˌbī, -ˌbē\ also in·cu·bus·es

Definition of INCUBUS

1

: an evil spirit that lies on persons in their sleep; especially : one that has sexual intercourse with women while they are sleeping — compare succubus

2

: nightmare 2

3

: one that oppresses or burdens like a nightmare

Origin of INCUBUS

Middle English, from Late Latin, from Latin incubare

First Known Use: 13th century