—v. (upsetting; past and past part. upset)
1 tr. & intr. overturn or be overturned.
2 tr. disturb the composure or digestion of (was very upset by the news; ate something that upset me).
3 tr. disrupt.
4 tr. shorten and thicken (metal, esp. a tire) by hammering or pressure.
—n.
1 a condition of upsetting or being upset (a stomach upset).
2 a surprising result in a game etc.
—adj. disturbed (an upset stomach).
Phrases and idioms:
upset price the lowest acceptable selling price of a property in an auction etc.; a reserve price.
Derivatives:
upsetter n. upsettingly adv.
Useful english dictionary. 2012.