Two definitions^[1] of morality:

– Recognition of the distinction between good and bad or between right and wrong.
→ It is moral to behave in a manner intended to produce good results.

– A set of social rules, customs, traditions, beliefs or practices which specify proper, acceptable forms of conduct.
→ It is moral to behave in accordance with the accepted rules of society.

For simplicity’s sake, let’s call the first definition value-based, and the second definition rule-based.

[1] From Wiktionary.