2) Unhappy; angry.
3) To defeat a favored opponent.
4) A victory over a favored opponent.
2) Catherine was still upset; she hadn't gotten over Mary's rude behavior at the party.
3) Lucas upset Dino, the nieghborhood's best tennis player, in the best-of-three-set match.
4) The White Sox scored a major upset over the over the Twins when Buehrle pitched a comple-game shutout.