adjective

 

unhappy or worried because something unpleasant has happened

They'd had an argument and she was still upset about it.

 

verb

 

worry to make someone feel unhappy or worried

The phone call had clearly upset her.

 

spoil to cause problems for something

If I arrived later would that upset your plans?

 

noun

 

sport when someone beats the player or team that was expected to win

After Harding won the second set, a major upset seemed likely.

 

problem a difficulty or problem

We had the usual upsets but overall the day went well.