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1. A substance that is fluid at room temperature and pressure
    
2. Continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas

1. Characteristic of a fluid; capable of flowing and easily changing shape
   - runny
    
2. Unconstrained and flowing smoothly in movement
   "the fluid motion of a cat";
   - fluent, liquid, smooth
    
3. In cash or easily convertible to cash
   "fluid assets";
   - liquid
    
4. Affording change (especially in social status)
   "Britain is not a truly fluid society";
   - mobile
    
5. Subject to change; variable
   "a fluid situation fraught with uncertainty";
   - unstable

Derived forms: fluids

See also: changeable, changeful, disposable, graceful, liquid

Type of: matter, substance

Encyclopedia: Fluid