annihilation /ənʌɪɪˈleɪʃ(ə)n/

a

I. noun [ mass noun]

1. complete destruction or obliteration

the threat of global annihilation.
2. total defeat

a show of independence is its only hope of avoiding annihilation in next year’s elections.
3.
[Physics] the conversion of matter into energy, especially the mutual conversion of a particle and an antiparticle into electromagnetic radiation.
– origin mid 16th cent.: from late Latin annihilatio(n-), from the verb annihilare (see annihilate).

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