Immoral describes actions that are seen as wrong, even if they result in no harm to someone. The immorality of an action is attributed by the social and cultural conditioning that you recieve as a child, and this includes religion. Some people are so ethnocentric that they think only morals can come from Christianity, and that said morals should be taught in grade school. I have several atheist friends, and they're more moral than some Christians I know.
This is not intended to be a slam on Christianity, but more of an example that everyone is probably farmiliar with.