"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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