Question

What is matter and antimatter?what is it's annihilation means?

Answer 1

Antimatter is identical to physical matter except that it is composed of particals whose electric charge are opposite to those found in normal matter.
Antimatter is the most powerful energy source known to man. It releases energy with 100 percent eficiency. Antimatter creates no pollution or radiation, and a droplet could power NY city for a full day.

It is created when two particles crash with each other at the speed which is nearly equal to that of light. The machine in which it is done is known as deceralator or the particle accelerator . I think this process of collision is known as Matter collision.