slightly informal to behave as if you are better than someone else and have the right to tell them what to do
He likes to lord it over the more junior people in the office.
phraselord over lord it over sb it someone lords it over you they behave in a way that shows they think they are much more important than you and they keep telling you what to do in a way that is very annoying and unreasonable: She seemed to enjoy lording it over the other members of her team.