1. The act or process of completely destroying or eliminating something
The annihilation of the enemy forces was swift and decisive.
A aniquilação das forças inimigas foi rápida e decisiva.
2. Complete destruction or obliteration of existence
The threat of mutual annihilation kept both nations in check.
A ameaça de aniquilação mútua mantinha ambas as nações em xeque.
3. In physics, the process where matter and antimatter collide and cancel each other out
Electron-positron annihilation releases energy in the form of gamma rays.
A aniquilação elétron-pósitron libera energia sob a forma de raios gama.