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ANNIHILATION meaning : 1. complete destruction, so that nothing or no one is left: 2. complete defeat: 3. complete…. Learn more. The meaning of ANNIHILATION is the state or fact of being completely destroyed or obliterated : the act of annihilating something or the state of being annihilated. How to use annihilation in a sentence. In particle physics, annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles, such as an electron colliding with a positron to produce two photons. [1] The total energy and momentum of the initial pair are conserved in the process and distributed among a set of other particles in the final state. Antiparticles have exactly opposite additive quantum numbers from particles, so the sums of all quantum numbers of such ... Annihilation is the act or process of destroying something completely, or the condition of being destroyed. It can also refer to the physics phenomenon of particle-antiparticle collision. See synonyms, antonyms, translations and usage examples.
