What does it mean to describe something as being quantized?

Answer 1

From wiki: Quanta is the minimum amount of any physical entity involved in an interaction. Behind this, one finds the fundamental notion that a physical property may be "quantized," referred to as "the hypothesis of quantization. This means that the magnitude can take on only certain discrete values. There is a related term of quantum number. An example of an entity that is quantized is the energy transfer of elementary particles of matter (called fermions) and of photons and other bosons.

Answer 2

Describing something as being quantized means that it exists in discrete, distinct quantities or units rather than in a continuous or infinite range. This concept is often used in physics to explain phenomena at very small scales, such as in quantum mechanics where certain properties like energy or angular momentum are quantized.