To make (a person) angry, distressed, or unhappy.
I’m sure the bad news will upset him, but he needs to know.
To disturb, disrupt or adversely alter (something).
Introducing a foreign species can upset the ecological balance.
To tip or overturn (something).
To defeat unexpectedly.
Truman upset Dewey in the 1948 US presidential election.
To be upset or knocked over.
The carriage upset when the horse bolted.
To set up; to put upright.
To thicken and shorten, as a heated piece of iron, by hammering on the end.
To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends.
The action of the verb upset.
Causing upset; distressing.
He found taking his cat to the vet to be put down very upsetting.
Conceited; presumptuous.