"thing to sit on, act of sitting," c.1200, from O.N. sæti "seat, position," from P.Gmc. *sæt- (cf. O.H.G. saze, M.Du. gesaete "seat," O.H.G. gisazi, Ger. Gesäß "buttocks"), from PIE base *sed- "to sit" (see sit). The verb is from 1577. Meaning "posterior
of the body" (the sitting part) is from 1607; sense of "part of a garment which covers the buttocks" is from 1835. Seat belt is from 1932, originally in airplanes.
seat
"residence, abode, established place," c.1275, extended use of seat (1), influenced by O.Fr. siege "seat, established place," and L. sedes "seat." Meaning "city in which a government sits" is attested from c.1400. Sense of "place in a parliament or other legislative body" is
attested from 1774. O.E. had sæt "place where one sits in ambush," which also meant "residents, inhabitants," and is the source of the -set in Dorset and Somerset.
n. the buttocks. : I was so angry. I wanted to kick him in the seat as he left.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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