upstairs
noun
the part of a building above the ground floor
“no one was allowed to see the upstairs”
adjective
on or of upper floors of a building
“the upstairs maid”
“an upstairs room”
SynonymsupstairOppositesdownstairs
adverb
on a floor above
“they lived upstairs”
Oppositesdownstairswith respect to the mind
“she's a bit weak upstairs”
Source: WordNet 3.1, Princeton University