Meaning of “upset” - Learner’s Dictionary


noun [ C ] us uk /ˈʌpset/

a situation in which someone beats the player or team that was expected to win:

They caused a major upset by beating the top team 3-1.
a stomach/tummy upset

UK an illness in the stomach


a difficulty or problem:

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

(Definition of “upset noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)