located higher up a building.They can sleep in the upstairs bedroom.
(baseball) a pitched ball that is high, and usually outside the strike zoneThat fastball was upstairs for a ball.
Adverb
upstairs
Up the stairs; on a higher floor or level.I'll take my shoes and put them away the next time I go upstairs.I hate the people who live upstairs, and I especially hate their piano.
(colloquial) In the brain.After Joe did a hula dance on the kitchen table, his friends wondered if he didn't have a lot going on upstairs.
(colloquial) In heaven, or any other place where a deity might be found.
