What is a synonym for absent?

Here are some synonyms for "absent", depending on the context:

General Absence:

* Missing

* Gone

* Not present

* Away

* Unaccounted for

Lacking Something:

* Devoid

* Wanting

* Deficient

* Scarce

* Absentminded (for mental focus)

Not Paying Attention:

* Distracted

* Inattentive

* Unmindful

* Thoughtless

* Preoccupied

For a Person:

* Unavailable

* Unreachable

* Out of touch

For a Feeling:

* Indifferent

* Apathetic

* Uninterested

* Detached

* Aloof

For a Quality:

* Lacking

* Without

* Empty

* Void

* Bare

The best synonym for "absent" will depend on the specific situation and the meaning you want to convey.