upset
noun
Definitions
Disturbance or disruption.
Example: My late arrival caused the professor considerable upset.
An unexpected victory of a competitor or candidate that was not favored to win.
(automobile insurance) An overturn.
Example: "collision and upset": impact with another object or an overturn for whatever reason.
An upset stomach.
verb
Definitions
To make (a person) angry, distressed, or unhappy.
Example: I’m sure the bad news will upset him, but he needs to know.
To disturb, disrupt or adversely alter (something).
Example: Introducing a foreign species can upset the ecological balance.
To tip or overturn (something).
To defeat unexpectedly.
Example: Truman upset Dewey in the 1948 US presidential election.
adjective
Definitions
(of a person) Angry, distressed or unhappy.
Example: He was upset when she refused his friendship.
(of a stomach or gastrointestinal tract, referred to as stomach) Feeling unwell, nauseated, or ready to vomit.
Example: His stomach was upset, so he didn't want to move.