n.1.  Law  a.  Early release of a prisoner who is then subject to continued monitoring as well as compliance with certain terms and conditions for a specified period.
b.  The duration of such conditional release.
 2.  A password used by an officer of the day, an officer on guard, or the personnel commanded by such an officer.
3.  Word of honor, especially that of a prisoner of war who is granted freedom only after promising not to engage in combat until formally exchanged.
4.  Linguistics   The act of speaking; a particular utterance or word.