👉 The mostly fluid refers to a substance that flows easily and smoothly, often in response to external forces or changes in conditions. This fluidity can be seen in liquids, gases, or even certain states of matter like superfluids, which exhibit zero viscosity and can move without losing energy. In everyday terms, it describes the ability of a material to deform under stress and return to its original shape without permanent deformation, characteristic of liquids like water or gases like helium.
