A boson is a tiny particle that carries forces between other particles.
You might hear about bosons in science or technology news, but they're not as mysterious as they sound. In physics, a boson is basically a messenger that helps other particles communicate with each other. It's like a delivery person bringing messages between different parts of a system. For example, the Higgs boson is a famous one because it was discovered at a big particle accelerator in Switzerland and got scientists very excited. They were searching for this particular boson to learn more about how everything works on a really small scale.
A particle with totally symmetric composite quantum states, which exempts them from the Pauli exclusion principle, and that hence obeys Bose-Einstein statistics. They have integer spin. Among them are many elementary particles, and some (gauge bosons) are known to carry the fundamental forces. Compare fermion.
