upstairs
1. up.stairs \'*p-'sta(*)rz, -'ste(*)rz\ av 1: up the stairs : to or on a
higher floor 2: to or at a high altitude or higher position
2. up.stairs \-.sta(*)rz, -.ste(*)rz\ aj 1a: situated above the stairs esp.
on an upper floor 1b: of or relating to the upper floors {~ maid} 2:
higher level
3. up.stairs \'*p-', '*p-.\ n pl but sing or pl in constr : the part of a
building above the ground floor
Webster's English Dictionary