Never hurts to go over this kind of thing again.
Your definition according to social consensus is completely insufficient when it comes to bigger questions than the ones we generally encounter in the sedate, peaceful West, in the modern pax americana.
Take a look at my scenario and I'd like to know your reaction to it given your measurement of morality.
And let me try to clarify my own position. The Bible is God's very self-revelation to humanity. He didn't tell us everything about Himself, but He told us an awful lot, and plenty to know what His law is and what is good and what is bad. Best of all, it's objective; good things are good no matter whether anyone believes they are good, b/c good is grounded in God's character, which does not change and is eternal. That which is bad is that which runs contrary to God's law. Thus raping little girls for fun is evil even if everyone in the entire world believes that raping little girls for fun is actually good. Similarly, refusing to worship Jesus is evil even if everyone in the entire world believes that worshiping Jesus is not good.