n. The study of the theoretical effects of astronomical bodies and forces on the Earth’s atmosphere.
the GNU version of the Collaborative International Dictionary of English
n. The investigation of the relation between the sun, moon, and stars, and the weather.
The Century Dictionary and Cyclopedia
n. The pretended art of foretelling the weather and its changes from the aspects and configurations of the moon and stars: a branch of natural astrology.
n. Prognostication of the weather from the appearance of the heavenly bodies.