@Clete So do you disagree with the definition that I posted?
Do you have a concise definition that you could post?
The one you posted from the American Heritage Dictionary, unless there's another one I missed, is, in my view, a rather worthless definition. I mean, it's technically correct, but in the context of this discussion, as well as most discussions about morality, it amounts to little more than a tautology.
Everyone already knows that morality concerns right and wrong. Defining morality in terms of right and wrong doesn't advance the discussion because the real question is what makes something right or wrong in the first place. What is the standard by which we determine that something is good or evil, and why is that standard objectively valid?
I know of no answer to that question that is genuinely objective other than to say, "That which is proper to life is the good, that which negates life is the evil."
Life is the standard of morality.
Every alternative I've encountered ultimately reduces to someone's personal opinion, which is the very opposite of objectivity, or else implicitly relies upon life as its standard without explicitly acknowledging it.
This is particularly important when discussing God's morality. If morality is merely a collection of rules imposed by some authority, then what standard applies to the ultimate authority Himself? If something is good merely because God commands it, then goodness becomes arbitrary. If God commands it because it is good, then goodness must have some objective meaning independent of the mere fact that He commands it.
Life is that objective standard. God is the living Creator. He is not merely the source of life, but life's ultimate expression. He is Life itself and He is the author of the rational principles by which life is sustained and flourishes precisely because He is both necessarily living and necessarily rational. His righteousness is, therefore, neither arbitrary nor dependent upon an authority above Himself. It is an expression of His own necessarily rational and life-affirming nature.