annihilation.

1. An interaction in which a particle and its antiparticle disappear as such, with their energy appearing in other forms or particles.

2. The complete destruction or elimination of something.

Use it for

Words that belong together

• matter-antimatter annihilation
• annihilation photons

On the page

The detector registered photons from annihilation.

The simulation followed an electron-positron annihilation event.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.