backstairs has definitions from the field of architecture
1
[ adjective ] secret and sly or sordid

Synonyms

furtive backstair

Examples

"backstairs gossip" "his low backstairs cunning"- A.L.Guerard "backstairs intimacies" "furtive behavior"

Related terms

covert

2
[ noun ] (architecture) a second staircase at the rear of a building

Related terms

stairway

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