Main Entry: ¹up·set

Pronunciation: \(ˌ)əp-ˈset\

Function: verb

Inflected Form(s): up·set; up·set·ting

Date: 1677

transitive verb 1 : to thicken and shorten (as a heated bar of iron) by hammering on the end : swage
2 : to force out of the usual upright, level, or proper position : overturn
3 a : to trouble mentally or emotionally : disturb the poise of <the news upset me> b : to throw into disorder c : invalidate d : to defeat unexpectedly <was upset in the primary>
4 : to cause a physical disorder in; specifically : to make somewhat ill <spicy food upsets my stomach>intransitive verb : to become overturned

synonyms see discompose

— up·set·ter noun

— upset the apple cart : to disturb or overturn a natural or stable order