† ˈbrandenburghObs. [f. the name of a city in Prussia, famous for woollen manufactures. So Fr.brandebourg.] A morning gown. 1676G. Etherege Man of Mode iv. ii. (1684) 61 Y' have a very fine Brandenburgh on, Sir Fopling.1691Fop Dict. Supp., Brandenburgh, a Morning Gown.