- absent - not in a specified place physically or mentally
Antonyms: present, attending, in attendance, ever-present, existing, here, omnipresent, ubiquitous, naturally occurring
- absent, absentminded, abstracted, scatty - lost in thought; showing preoccupation; "an absent stare"; "an absentminded professer"; "the scatty glancing quality of a hyperactive but unfocused intelligence"
Antonym: attentive (indirect, via inattentive)