disengagement

Short definition from Wiktionary

Noun

1. 1
   Release or detachment from a physical situation or other involvement.
2. 2
   The release or separation of a chemical.
3. 3
   Leisure; relief from responsibilities or onerous activities.
4. 4
   Withdrawal from combat, confrontation, or the assertion of influence.
5. 5
   Termination of an agreement to be married.
6. 6
   A circular movement of the blade that blocks an opponent's parry.
7. 7
   The emergence of the fetus from the birth canal.