ARISTOTLE often claims that words are "homonymous" or "multivocal". He claims this about some of the crucial words and concepts of his own philosophy—"cause," "being," "one," "good," "justice," "friendship." Often he claims it with a polemical aim; other philosophers have wrongly overlooked homonymy and supposed that the same word is always said in the same way. Plato made this mistake; his accounts of being, good, and friendship are rejected because they neglect homonymy and multivocity. In Aristotle’s view Plato shared the (...) Socratic assumption about words and definitions. Socrates thought that when he asked "What is F?" some single definition of F could always be found to match the name "F." Aristotle thinks the Socratic question is important, but argues that it must be controlled by awareness of homonymy and multivocity. (shrink)