👉 The term "fluid" in this context refers to a substance that can flow or change shape easily. It often describes liquids, which have no fixed shape but take the form of their container due to the movement of their molecules. However, the term can also apply to gases and semi-liquid states like water at certain temperatures and pressures, where they exhibit properties of both flowing and being confined. In everyday language, "fluid" is commonly used to describe anything that can move or change its form without a rigid structure, such as water, oil, or even the air we breathe.
