A person who has physically removed him- or herself from the control or direction of a military or naval unit with the intention of permanently leaving
Under the United States Code of Military Justice, a person who has been placed on AWOL status for more than 30 days
A person or group that does not show up.
An absence; failure to show up or to make a scheduled appearance, especially at a hotel or a place of employment.
To fail to show up for something.