upstairs
up-stairs
adjective
Located on a higher floor or level within a building.
"The upstairs flat is vacant."
adverb
To or on a higher floor or level within a building.
"She went upstairs to bed."
noun
The higher floor or floors of a building.
"The upstairs needs redecorating."
Thesaurus
Synonyms: on a higher floor, up the stairs
Antonyms: below, down the stairs, downstair, downstairs, on a lower floor