n.
Pronunciation: ' i ŋ -ky ə -b ə s, ' in-
Function: noun
Inflected Form: plural -bi \ - ˌ b ī , - ˌ b ē \ also -bus · es
Etymology: Middle English, from Late Latin, from Latin incubare
Date: 13th century
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