Annihilation

Noun

1. The act of destroying or otherwise turning into nothing, or nonexistence.
2. The act of destroying the form or combination of parts under which a thing exists, so that the name can no longer be applied to it.

   "the annihilation of a corporation"

3. The state of being annihilated.
4. The process of a particle and its corresponding antiparticle combining to produce energy.