Directoire is a style of furniture, decorative arts and fashion which arose between 1795 and 1799. These were the final years of the French Revolution, when France was governed by a group of five men known as the Directory.
In French, bombé means rounded, curved or bulging. Bombé furniture has sections with curves or bulges, usually at the front and sides. In British English a bureau is a writing desk or table, with drawers; in American English a bureau is a chest of drawers.
Click here to see a Directoire period writing desk (bureau plat) which is not bombé.