Definitions for "Dos-à-dos"
Back to back; as, to sit dos-à-dos in a dogcart; to dance dos-à-dos, or so that two dancers move forward and pass back to back.
A sofa, open carriage, or the like, so constructed that the occupants sit back to back.
A four-seater auto in which four passengers face each other or sit back-to-back. Seldom seen after the early 1900s.
Two separate titles bound back-to-back sharing the same binding.
A binding in which two volumes are joined by a shared central cover with the fore-edges on opposing sides of the book so formed. This method of binding is a novelty most commonly found in books of the 17th century and earlier, although the technique has been used for modern books on occasion.
Two separate books in a single binding. Flip the book over, and you have another cover with a different title.