(n.) Any philosophical doctrine which refers all knowledge to, and founds it upon, any subjective states; egoism.

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