Adjective backstairs has 1 sense
  1. backstair, backstairs, furtive - secret and sly or sordid; "backstairs gossip"; "his low backstairs cunning"- A.L.Guerard; "backstairs intimacies"; "furtive behavior"
    Antonyms: overt, open (indirect, via covert)
,Noun backstairs has 1 sense
  1. backstairs - a second staircase at the rear of a building
    --1 is a kind of
    stairway, staircase, stairs, steps
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