Upset
Appearance
Upset may refer to:
- Upset, in a competition where a likely winner loses to an underdog.
- Upset forging, a forging process where a workpiece's diameter is increased by compressing its length.
- Depression (mood), upset emotionally.
- Upset, the only thoroughbred horse to defeat legendary racehorse Man o' War.
- Upset (chemical release), an unplanned release of toxic emissions by chemical processing plants
- Upper set, (in mathematics), also called an upward closed set or just an upset, is a subset Y of a given partially ordered set (X,≤) such that, for all elements x and y, if x is less than or equal to y and x is an element of Y, then y is also in Y.