Open English Wordnet
Nouns
(n)fluida substance that is fluid at room temperature and pressure (n)fluidcontinuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas Adjectives
(s)fluid, unstablesubject to change; variable“a fluid situation fraught with uncertainty”,
“everything was unstable following the coup” (s)fluid, runnycharacteristic of a fluid; capable of flowing and easily changing shape (s)fluent, fluid, liquid, smoothsmooth and unconstrained in movement“a long, smooth stride”,
“the fluid motion of a cat”,
“the liquid grace of a ballerina” (s)fluid, liquidin cash or easily convertible to cash“liquid (or fluid) assets” (s)fluid, mobileaffording change (especially in social status)“Britain is not a truly fluid society”,
“upwardly mobile”