<p><strong>Noun</strong></p><ul><li>a substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape</li></ul><p><strong>Adjective</strong></p><ul><li>pertaining to a substance that easily changes its shape; capable of flowing</li><li>consisting of or pertaining to fluids</li><li>changing readily; shifting; not fixed, stable, or rigid: fluid movements</li><li>convertible into cash: fluid assets</li></ul>