A boudoir (/ˈbuːd.wɑːr/; French: [bu.dwaʁ]) is a woman's private sitting room or salon in a furnished accommodation usually between the dining room and the bedroom, but can also refer to a woman's private bedroom. The term derives from the French verb bouder to sulk, or boudeur sulk or sulking, and originally was a room for sulking in, to put away or withdraw to.
The Marquis de Sade (1740-1814) in his literary works helped develop a reputation in this small room dedicated to the privacy of female talks. Since the success of his book Philosophy in the Bedroom, the small sitting room or salon has a sulphurous and scandalous reputation combined with those of all exchanges and frolics.
A cognate of the English "bower", historically, the boudoir formed part of the private suite of rooms of a "lady" or upper-class woman, for bathing and dressing, adjacent to her bedchamber, being the female equivalent of the male cabinet. In later periods, the boudoir was used as a private drawing room, and was used for other activities, such as embroidery or spending time with one's romantic partner.