Definition of the upstairs
: the upper floors of a building We're having the upstairs carpeted.
Word by Word Definitions
: up the stairs : on or to a higher floor
: to or at a high altitude or higher position
: in the head : intellectually
: situated above the stairs especially on an upper floor
: the part of a building above the ground floor
Seen and Heard
What made you want to look up the upstairs? Please tell us where you read or heard it (including the quote, if possible).