the ethical doctrine that virtue is based on utility, and that conduct should be directed toward promoting the greatest happiness of the greatest number of persons.
u·til·i·tar·i·an·ism (yōō-tĭl'ĭ-târ'ē-ə-nĭz'əm) n.
The belief that the value of a thing or an action is determined by its utility.
The ethical theory proposed by Jeremy Bentham and James Mill that all action should be directed toward achieving the greatest happiness for the greatest number of people.
The quality of being utilitarian: housing of bleak utilitarianism.