American Dictionary

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Definition upset in American English

upset noun

noun
/ˈʌpˌset/
1

an occasion when someone defeats an opponent who is considered to be better than them

Example

It was one of the biggest upsets of the tournament.

Synonyms and related words
2

an illness that affects your stomach, usually caused by something that you have eaten or drunk

Example

a stomach/tummy upset

Synonyms and related words
3

a feeling of sadness, worry, or anger

Synonyms and related words
3.1

something that makes you feel sad, worried, or angry

Definition upset in American English