absentminded absentminded /ˌæbsəntˈmaɪndɪd/

adjective

1. () Lost in thought; showing preoccupation  ( absent , abstracted , scatty [Informal, British] , absentminded )
   lost in thought; showing preoccupation
    An absent stare
   an absent stare
    An absentminded professor
   an absentminded professor
    The scatty glancing quality of a hyperactive but unfocused intelligence
   the scatty glancing quality of a hyperactive but unfocused intelligence