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English definition of “upset”

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upset

noun [C]
 
 
/ˈʌpset/
SPORT 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.Winning and defeatingScoring, winning and losing in sport
a stomach/tummy upset UK an illness in the stomachNot fit and healthyThin or slender (of people)
PROBLEM a difficulty or problem: We had the usual upsets but overall the day went well.Difficult situations and unpleasant experiencesAccidents and disasters
(Definition of upset noun from the Cambridge Learners Dictionary © Cambridge University Press)
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