1. a Persian prophet who founded Manichaeism (216-276);
The Collaborative International Dictionary of English v.0.48:
Manes \Ma"nes\, n. pl. [L.] (Rom. Antiq.)
The benevolent spirits of the dead, especially of dead
ancestors, regarded as family deities and protectors.
Hail, O ye holy manes! --Dryden.
WordNet (r) 3.0 (2006):
n 1: a Persian prophet who founded Manichaeism (216-276)
The Devil's Dictionary (1881-1906):
MANES, n. The immortal parts of dead Greeks and Romans. They were in
a state of dull discomfort until the bodies from which they had
exhaled were buried and burned; and they seem not to have been
particularly happy afterward.