Adjective
absent without leave (not comparable)
In the armed forces, being absent from one's post without prior authorization.
Asked how many of the police officers have gone absent without leave, he said he does not know yet. Source: Internet
Under Nauru’s Constitution, a member is deemed to have vacated his seat if he is absent without leave of Parliament on every day on which a meeting of Parliament is held during a period of two months. Source: Internet