A substance that is fluid at room temperature and pressure.

Roget 241: amorphism^†, informity^†; unlicked cub^†; rudis indigestaque moles [Lat.]; disorder etc. 59; deformity etc. 243.    disfigurement, defacement; mutilation; deforming.    chaos, randomness (disorder) 59.    [taking form from surroundings] fluid etc. 333.    ... show more

Roget 333: fluidity, liquidity; liquidness etc. adj.^†; gaseity etc. 334^†.    fluid, inelastic fluid; liquid, liquor; lymph, humor, juice, sap, serum, blood, serosity^†, gravy, rheum, ichor^†, sanies^†; chyle [Med.].    solubility, solubleness^†.    [Science of liquids at rest] hydrology, hydrostatics, hydrodynamics.    ... show more

Dutch: vloeistof, nat, nattigheid, vocht, zweet

Continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas.

Dutch: vloeistof

Subject to change; variable:
— A fluid situation fraught with uncertainty.

synonym: unstable.

Roget 240: formed etc. v.. [Receiving form] plastic, fictile^†; formative; fluid.    [Giving form] plasmic^†.    [Similar in form] isomorphous.    [taking several forms] pleomorphic; protean; changeable, etc. 149.    ... show more

Characteristic of a fluid; capable of flowing and easily changing shape.

synonym: runny.

Smooth and unconstrained in movement:
— The fluid motion of a cat.

synonyms: fluent, liquid, smooth.

Roget 333: liquid, fluid, serous, juicy, succulent, sappy; ichorous^†; fluent etc. (flowing) 348.    liquefied etc. 335; uncongealed; soluble.    ... show more

Polish: płynny, miękki

In cash or easily convertible to cash:
— Liquid (or fluid) assets.

synonym: liquid.

Affording change (especially in social status):
— Britain is not a truly fluid society.

synonym: mobile.