(in Egyptian mythology). Judge of the dead, and potentate of the kingdom of the ghosts. This brother and husband of Isis was worshipped under the form of an ox. The word means Many-eyed. Osiris is the moon, husband of Isis.
“We see Osiris represented by the moon, and by an eye at the top of fourteen steps. These steps symbolise the fourteen days of the waxing moon.” —J. N. Lockyer, in the Nineteenth Century, July, 1892, p. 31.
Osiris is used to designate any waning luminary, as the setting sun, as well as the waning moon or setting planet.
Osiris is the setting sun, but the rising sun is Horus, and the noonday sun Ra.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894