From Longman Dictionary of Contemporary Englishbelow stairsbelow stairsBritish English old-fashionedLOW POSITION OR RANK in the servants’ part of a large house, in the past → stair
Examples from the Corpus
below stairs• He stirred as below stairs the maid tinkled a bell, the sign for dinner.• Delgard had assured him that St Joseph's no longer kept its dead below stairs.• The air of excitement was as great below stairs as it was above.• Mrs Gracie, left below stairs, set her lips.• To clean all the rooms below stairs. 