Absent Without Leave Definition

Absent from one's assigned military post or duties without official permission; AWOL.
American Heritage
In the armed forces, being absent from one's post without prior authorization.
Absent from duty without official permission but with no intention of deserting.
Webster's New World

The act of being away from one’s military duties or post without permission but with no intent of deserting. Abbreviated as AWOL. See also desertion.

Webster's New World Law