The sum of all the good deeds that a person does which determines the quality of the person's next state of existence and contributes to the person's growth towards enlightenment.
Usually in the plural form the merits: the substantive rightness or wrongness of a legal argument, a lawsuit, etc., as opposed to technical matters such as the admissibility of evidence or points of legal procedure; (by extension) the overall good or bad quality, or rightness or wrongness, of some other thing.