1. (n.) The doctrines or philosophy by Plato or of his followers.

2. (n.) An elevated rational and ethical conception of the laws and forces of the universe; sometimes, imaginative or fantastic philosophical notions.

Berkeleianism Hegelianism Kantianism Neoplatonism Platonic form Platonic idea Platonism absolute idealism allotheism animatism form heathendom heathenism heathenry hylozoism idealism idolatry immaterialism metaphysical idealism monistic idealism pagandom paganism paganry panpsychism personalism psychism solipsism spiritualism subjectivism transcendental universal