Incubus

·noun The nightmare. ·see Nightmare.

II. Incubus ·noun Any oppressive encumbrance or burden; anything that prevents the free use of the faculties.

III. Incubus ·noun A demon; a fiend; a lascivious spirit, supposed to have sexual intercourse with women by night.

incubus
in-cŭbus, i, m. [1. incubo], the nightmare , incubus , Aug. Civ. Dei, 15, 23; Isid. Orig. 8, 11. ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.