👉 A fluid, in this context, typically refers to a substance that flows easily or smoothly without resistance. It can be liquids, gases, or even certain semi-liquid states like molten rock or supercritical fluids. In everyday language, when we talk about a fluid, we often mean something that can move and take the shape of its container, like water or oil. This property makes fluids essential in various natural processes and human activities, from the movement of water in rivers to the functioning of engines that use liquid fuels.
