What is annihilation?

annihilation meaning in Science terminology / glossary / dictionary is:
Annihilation of particles is the disappearance of the mass energy of a particle and its corresponding antiparticle, and its appearance as another sort of energy (possibly including a spray of particles of total quantum number zero for each of the additive quantum numbers).


reference: Berkeley Lab. U.S. Department of Energy



What is Annihilation ?

Annihilation is (noun) total destruction. Antonym protection


source: Easier English, Student Dictionary Upper Intermediate Level