Check out the John Piper article and the other Piper articles like it. See if you are convinced that an elder should not be divorced. He makes a pretty strong exegetical case. If you google "John Piper and divorce" you can find about 3 or 4 good articles.
John MacArthur claims it means "One woman man." which he went on further to say it meant to not be a womanizer, and married to only one woman at a time.
BUt, I think he is full of himself.