(Gr. hedone pleasure) "The thesis that pleasure is the highest good: that only pleasure has value in itself. Among philosophers held to have advocated this view are Aristippus, Epicurus, and Bentham. It is sometimes called ethical hedonism, to distinguish it from psychological hedonism.
Pleasure is not the same as happiness, so hedonism is not the same as eudaimonism, the thesis that happiness is the highest good."
The Penguin Dictionary of Philosophy
ed. Thomas Mautner
The Abolitionist Project
Critique of Brave New World
The Cyrenaics and the Origin of Hedonism