above·stairs I. \ ̷ ̷| ̷ ̷| ̷ ̷\adverb : in or on an upper story < they sat abovestairs > II. adjective Etymology:abovestairs (I) : located on an upper story < a room abovestairs > III. noun plural but singular in construction Etymology:abovestairs (I) : the part of a building above the ground floor < a shout from abovestairs >