👉 Fluid, in the context of fluid dynamics, refers to a state of matter that exhibits properties of both liquids and gases. It can flow like a liquid while also taking the shape of its container, unlike gases which expand to fill any space. Fluids have a definite volume but no fixed shape, and they can move from areas of higher pressure to lower pressure. This unique behavior arises because the particles in a fluid are closely packed but not rigidly bound, allowing them to slide past one another when force is applied. Examples of fluids include water, air, and oils.
