1. A substance that is fluid at room temperature and pressure
   "The mechanic checked the fluid levels in the car"
    
2. Continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas
   "The hydraulic system uses fluid to transmit power"

1. Characteristic of a fluid; capable of flowing and easily changing shape
   "The fluid egg yolk oozed across the plate";
   - 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