[syn: downstairs, down the stairs, on a lower floor, below]
The Collaborative International Dictionary of English v.0.48:
downstair \downstair\, downstairs \downstairs\adj.
on or of the lower floors of a building, especially the
ground floor; as, the downstairs (or downstair phone; the
house has no downstairs bathroom. Opposite of upstairs.
[WordNet 1.5]
The Collaborative International Dictionary of English v.0.48:
downstairs \down"stairs\, adv.
Down the stairs; to a lower floor; as, she headed downstairs
as soon as she heard the horn.
[1913 Webster +PJC]
WordNet (r) 3.0 (2006):
downstairs
adv 1: on a floor below; "the tenants live downstairs" [syn:
downstairs, down the stairs, on a lower floor,
below] [ant: on a higher floor, up the stairs,
upstairs]
adj 1: on or of lower floors of a building; "the downstairs (or
downstair) phone" [syn: downstairs, downstair] [ant:
upstair, upstairs]