up·set ( p-s t )v. up·set, up·set·ting, up·sets v.tr. 1. To cause to turn or tip over; capsize. 2. To disturb the functioning, order, or course of: Protesters upset the meeting by chanting and shouting. 3. To distress or perturb mentally or emotionally: The bad news upset me. 4. To overthrow; overturn: upset a will. See Synonyms at overthrow. 5. ( pst ) To defeat unexpectedly (an opponent favored to win).6. To make (a heated metal bolt, for example) shorter and thicker by hammering on the end. v.intr. 1. To become overturned; capsize. 2. To become disturbed. n. ( pst)1. The act of upsetting or the condition of being upset. 2. A disturbance, disorder, or state of agitation. 3. A game or contest in which the favorite is defeated. 4. a. A tool used for upsetting; a swage. b. An upset part or piece. adj. 1. Having been overturned; capsized. 2. Exhibiting signs and symptoms of indigestion: an upset stomach. 3. In a state of emotional or mental distress; distraught: upset parents. [Middle English upsetten, to set up : up-, up- + setten, to set; see set1.] up·set ter n.up·set ting·ly adv. |
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