according to moral principles about what is right and wrong:
What you did wasn't illegal, but it was morally wrong.
There is a belief that village life is somehow morally superior to city life.
Such hypocrisy is morally indefensible.
The Constitution is not morally neutral but is based on certain central values.
certain about something that cannot be proved:
I am morally certain that he is incapable of deliberately harming anyone.