from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A system of ethics that evaluates actions in terms of their capacity to produce happiness.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A philosophical notion, or system of ethics, which measures happiness in relation to morality. (Not to be confused with utilitarianism, which similarly emphasizes happiness but conceives of it differently.)
From Ancient Greek εὐδαίμων (eudaimōn, "having a good genius, happy, fortunate"), from εὖ (eu, "well") + δαίμων (daimōn, "a genius, spirit") (Wiktionary)