annihilation

The definition of an annihilation is the entire and complete destruction of a place, thing or group.

(noun)

An example of an annihilation is the bombing of an entire town and the resulting murder of all the residents.

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See annihilation in American Heritage Dictionary 4

noun
  1. a. The act or process of annihilating.
    b. The condition of having been annihilated; utter destruction.
  2. Physics The phenomenon in which a particle and an antiparticle, such as an electron and a positron, meet and are converted completely to energy approximately equivalent to the sum of their masses.

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