fluid

Universal Words noun, adjective noun [C,U] a liquid; a substance that can flow: body fluids (= for example, blood) * The doctor told him to drink plenty of fluids. * cleaning fluid adjective 1 (formal) (of movements, designs, music, etc.) smooth, graceful and flowing: a loose, fluid style of dancing * fluid guitar playing * the fluid lines of the drawing 2 (formal) (of a situation) likely to change; not fixed: a fluid political situation * a fluid relationship between managers and staff * the growth of a socially fluid urban society 3 (technical) that can flow freely, as gases and liquids do: a fluid consistency