Fluid
 

fluid
adjective1.subject to change; variable; "a fluid situation fraught with uncertainty"; "everything was unstable following the coup"2.characteristic of a fluid; capable of flowing and easily changing shape3.smooth and unconstrained in movement; "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina"[syn: fluent]4.in cash or easily convertible to cash; "liquid (or fluid) assets"5.affording change (especially in social status); "Britain is not a truly fluid society"; "upwardly mobile"
noun1.a substance that is fluid at room temperature and pressure2.continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas