(n.) The science of human duty; the body of rules of duty drawn from this science; a particular system of principles and rules concerting duty, whether true or false; rules of practice in respect to a single class of human actions; as, political or social ethics; medical ethics.

aesthetics allegiance assigned task axiology bounden duty burden business call of duty casuistry charge commitment cosmology dedication deference devoir devotion duties and responsibilities duty epistemology fealty first philosophy gnosiology homage imperative line of duty logic loyalty mental philosophy metaphysics mission moral philosophy must obligation ontology onus ought phenomenology philosophastry philosophic doctrine philosophic system philosophic theory philosophical inquiry philosophical speculation philosophy place respect school of philosophy school of thought science of being self-imposed duty sophistry theory of beauty theory of knowledge value theory