Definition of: upset

(up·set′) v. ·set, ·set·ting v.t.
1. To overturn.
2. Tothrow into confusion or disorder.
3. To disconcert; derange or disquiet.
4. To defeat, especially unexpectedly: Navy upset Army.
5. To shorten and thicken (metal) by hammering or by pressure: to upset a bolt to form a head or to upset the metal tire of a wheel.
6. To swage (the ends of the teeth of a saw).
—v.i.
7. To become overturned.
—adjective (also up′set′) Set up; required: in the phrase upset price, a price at which property is offered for sale, as by an auctioneer, as the lowest selling price.
—noun (up′set′) The act of upsetting, or the state of being upset.
—up·set′ter noun