- upstairs, upstair - on or of upper floors of a building; "the upstairs maid"; "an upstairs room"
Antonyms: downstairs, downstair, ground-floor
- upstairs, up the stairs, on a higher floor - on a floor above; "they lived upstairs"
Antonyms: downstairs, down the stairs, on a lower floor, below
- upstairs, in the head, in the mind - with respect to the mind; "she's a bit weak upstairs"