Cosmogony \Cos*mog"o*ny\ (-n?), n.; pl. {Cosmogonies} (-n?z). [Gr. kosmogoni`a; ko`smos the world + root of gi`gnesthai to be born: cf. F. cosmogonie.] The creation of the world or universe; a theory or account of such creation; as, the poetical cosmogony of Hesoid; the cosmogonies of Thales, Anaxagoras, and Plato.