D defs.my
Entry 2 senses Webster, 1913

Hedonism

/hēdənĭzəm/ · Hed·on·ism · IPA /ˈhiːdənɪzəm/
01 n. The doctrine of the Hedonic sect; the pursuit of pleasure as a matter of ethical principle.
  1. 1.
    The doctrine of the Hedonic sect; the pursuit of pleasure as a matter of ethical principle.
  2. 2.
    The ethical theory which finds the explanation and authority of duty in its tendency to give pleasure.