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1. The level of the surface of a body of water
    
2. Underground surface below which the ground is wholly saturated with water
   "spring rains had raised the water level"
   - water table, groundwater level
    
3. A line corresponding to the surface of the water when the vessel is afloat on an even keel; often painted on the hull of a ship
   - waterline, water line
    
4. A water gauge that shows the level by showing the surface of the water in a trough or U-shaped tube

Derived forms: water levels

Type of: elevation, formation, geological formation, line, water gage [US], water gauge, water glass, water-gauge

Encyclopedia: Water level