|Origin:||, past participle of annihilare 'to reduce to nothing', from Latin ad- 'to' + nihil 'nothing'|
to destroy something or someone completely:
Just one of these bombs could annihilate a city the size of New York.
to defeat someone easily and completely in a game or competition:
Tyson annihilated his opponent in the first round.
—annihilation noun [uncountable]