v. t. 1. To set up; to put upright. [ Obs. ] “With sail on mast upset.” R. of Brunne. [ 1913 Webster ]

2. (a) To thicken and shorten, as a heated piece of iron, by hammering on the end. (b) To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends. [ 1913 Webster ]

3. To overturn, overthrow, or overset; as, to upset a carriage; to upset an argument. “Determined somehow to upset the situation.” Mrs. Humphry Ward. [ 1913 Webster ]

4. To disturb the self-possession of; to disorder the nerves of; to make ill; as, the fright upset her. [ Colloq. ] [ 1913 Webster ]

5. (Basketwork) To turn upwards the outer ends of (stakes) so as to make a foundation for the side of a basket or the like; also, to form (the side) in this manner. [ Webster 1913 Suppl. ]

v. i. To become upset. [ 1913 Webster ]

a. Set up; fixed; determined; -- used chiefly or only in the phrase upset price; that is, the price fixed upon as the minimum for property offered in a public sale, or, in an auction, the price at which property is set up or started by the auctioneer, and the lowest price at which it will be sold. [ 1913 Webster ]

After a solemn pause, Mr. Glossin offered the upset price for the lands and barony of Ellangowan. Sir W. Scott. [ 1913 Webster ]

n. The act of upsetting, or the state of being upset; an overturn; as, the wagon had an upset. [ 1913 Webster ]

a. 1. Conceited; assuming; as, an upsetting fellow. [ Scot. ] Jamieson. [ 1913 Webster ]

2. such as to disturb the self-possession of; unnerving; causing mental distress; as, the sight was an upsetting experience. [ PJC ]

. A thermometer by merely inverting which the temperature may be registered. The column of mercury is broken and, as it remains until the instrument is reset, the reading may be made at leisure. [ Webster 1913 Suppl. ]