DCHP-1 Online
trading coat Fur Trade, Obs. 
a gaudy garment or outfit of clothing presented to an Indian leader or "captain" (def. 2) as an inducement to trade furs.
See also: captain (def. 2) captain's coat
- 1783 (1954) Sibley you'll keep close employed in fitting up the new House & Leask in making Trading Coats. . . .
- 1784 (1954) Two Taylors at work for the men and one making trading coats.
- 1783 (1954) Sibley you'll keep close employed in fitting up the new House & Leask in making Trading Coats. . . .