annihilation

Etymology

From Middle French annihilation, from Latin ad (“to”) + nihil (“nothing”). Morphologically annihilate + -ion

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.
   If you ask how religion thus falls on the thorns and faces death, and in the very act annuls annihilation, I cannot explain the matter, for it is religion's secret, and to understand it you must yourself have been a religious man of the extremer type. 1902, William James, The Varieties of Religious Experience, Lecture 2
4. (physics) The process of a particle and its corresponding antiparticle combining to produce energy.