also absentminded, "so preoccupied as to be forgetful of one's immediate surroundings," 1810, from absent (adj.) + -minded. Absence of mind "habitual or temporary forgetfulness" is from 1782. Related: Absent-mindedly; absent-mindedness.
abscond
absence
absent
absentee
absenteeism
absent-minded
absinthe
absit omen
absolute
absolute zero
absolutely