 As we’ve just seen, not all codes that are put forward by societies or groups are moral codes in the descriptive sense of morality, and not all codes that would be accepted by all moral agents are moral codes in the normative sense of morality. So any definition of morality—in either sense—will require further criteria. Still, each of these two very brief descriptions of codes might be regarded as offering some features of morality that would be included in any adequate definition. In that way they might be taken to be offering some definitional features of morality, in each of its two senses. When one has specified enough definitional features to allow one to classify all the relevant moral theories as theories of a common subject, one might then be taken to have given a definition of morality. This is the sense of “definition” at work in this entry.