a. In full, three pair of stairs (see PAIR sb.1 6 b). Of or belonging to the third floor, as in three-pair room, back, front, window.
1788. Phil. Trans., LXXVIII. 217. Out of a three-pair-of-stairs window.
1818. Scott, Hrt. Midl., xli. Like a squirrel in his cage, hung out of a three pair of stairs window.
1838. Dickens, Nich. Nick., xxi. In the two-pair back of the house … or in the three-pair front.
1883. Mrs. Plunkett, in Harper’s Mag., Jan., 236/2. Kate was established in the little ‘three pair back.’
