1.Definition: afflicted with or marked by anxious uneasiness or trouble or grief
"Too upset to say anything"
2.Definition: having been turned so that the bottom is no longer the bottom
"The upset pitcher of milk"
3.Definition: mildly physically distressed
"An upset stomach"
4.Definition: thrown into a state of disarray or confusion
"With everything so upset"
5.Definition: used of an unexpected defeat of a team favored to win
"The Bills' upset victory over the Houston Oilers"