Definition of "backstair" []

• Clandestine, secret or furtive (adjective)

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• "We went clapping up a clean stone backstair, and then into a back passage cheerfully decorated with ragged light-green Kidderminster, and issued upon"
• "I descended a stair corresponding with that backstair, as I am told, up which Madame had led me only the night before."
• "A few days later we learned that Newt Gingrich was resentful over his accommodations and what he viewed as the unceremonious backstair exit offered him and other guests when the plane arrived at Andrews Air Force Base."