He 'went over his supervisor's head' to complain about the policy to the company's president. [=he complained about the policy to the company's president rather than his supervisor]
What is the average income 'per capita' in the state? [=what is the average income for people in the state?; how much money does each person in the state earn on average?]
She feels that there is nothing wrong with gambling 'per se', but she thinks that it should be done in moderation.
(..) (sonar pinging) Dive six - here we are again on the deck of Titanic. / miles down, meters. The pressure outside is / tons per square inch. These windows are nine inches thick. lf they go, it's sayonara in two microseconds. All right. Enough of that bullshit. Put her down on the roof (..)1997 Titanic