What is a quantization?

The term "quantized" means, is divided into discreet sections which are indivisible; or in other Words, it is made of small sections that cannot be made into even smaller sections. In the science of quantum mechanics, it turns out that matter, energy, space and time are all quantized. There is a smallest quantity of each of these which cannot be subdivided into an even smaller quantity. One of these tiny, indivisible pieces would be called a quantum.