Absent-mindedness can refer to three very different things: # a low level of attention ("blanking" or “zoning out”); # intense attention to a single object of focus (hyperfocus) that makes a person oblivious to events around him; or
# unwarranted distraction of attention from the object of ...
absent in mind; abstracted; preoccupied; forgetful or careless due to distraction; easily distracted
(absent-mindedly) Preoccupiedly; in an absent-minded manner
(absent-mindedness) a form of forgetfulness that results from inattention.