What does my wife (or any woman) mean when she says I don`t respect her?
Depends on the context...
But usually it just means that she perceives something you do to be disrespectful of her opinions or emotions, or that you don't respect the sanctity of your relationship, or that you're sexist.
You'd really have to ask her. Personally I can't stand women who skirt around issues, we all know men are f'kin clueless when it comes to these matters, so better to just say EXACTLY what's on your mind, men don't get hints or subtlety!