Upstairs

adv. on the upper floors of a building

adj. of the upper floors of a building

n. upper floors of a building

Stairs, staircase, stairway, and flight of stairs are all names for a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. Stairways may be straight, round, or may consist of two or more straight pieces connected at angles.Special stairways include escalators and ladders. Alternatives to stairways are elevators, stairlifts and inclined moving sidewalks.
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Adjective
1. on or of upper floors of a building; "the upstairs maid"; "an upstairs room"
(synonym) upstair
(antonym) downstairs, downstair
Adverb
1. on a floor above; "they lived upstairs"
(synonym) up the stairs, on a higher floor
(antonym) downstairs, down the stairs, on a lower floor, below
2. with respect to the mind; "she's a bit weak upstairs"
(synonym) in the head, in the mind

(adv.)
Up the stairs; in or toward an upper story.
  

(a.)
Being above stairs; as, an upstairs room.
  

The upper half of the board