hedonism

Concise Oxford English Dictionary © 2008 Oxford University Press:
hedonism /ˈhiːd(ə)nɪz(ə)m, ˈhɛ-/

▶noun

• 1 the pursuit of pleasure; sensual self-indulgence.

• 2 Philosophy the ethical theory that pleasure (in the sense of the satisfaction of desires) is the highest good and proper aim of human life.

– derivatives
hedonist noun,
hedonistic adjective,
hedonistically adverb.

– origin C19: from Gk hēdonē ‘pleasure’ + -ism.