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| an·ni·hi·la·tion [ ə n ə láysh'n ] |
noun |
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1. destruction: the complete destruction of something
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2. defeat of opponent: the decisive defeat of an opponent
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informal
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3. nuclear physics destructive collision of particle and antiparticle: the process in which a particle combines with its antiparticle, destroying both and releasing their energy in the form of radiation or other particles
 annihilation radiation
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