1530s, "of or pertaining to Greek philosopher Plato" (429 B.C.E.-c.347 B.C.E.), from Latin Platonicus, from Greek Platonikos. The name is Greek Platon, properly "broad-shouldered" (from platys "broad;" see plaice (n.)). His original name was Aristocles. The meaning "love free of sensual desire" (1630s), which the word usually carries nowadays, is a Renaissance notion; it is based on Plato's writings in "Symposium" about the kind of interest Socrates took in young men, which originally had no reference to women. Related: Platonically.