To me, it is keeping one's word, acting with an at least moderate amount of decorum, standing up for what one believes, admitting one's mistakes and apologizing when necessary, dealing impartially with people/not playing favorites, following generalized societal rules and giving people their own chances to screw up before giving up on them.
I would like some clarification on this. Because my definition seems to not quite match what other people think. Or people can post what they think this word means to them. I've been called a coward before, believe it or not, in the past. So, answers please, Gentle Readers.