The process of turning a solid into a liquid. During cataract removal, the phacoemulsification process liquefies the contents of the lens through a small incision.
Behave as a fluid. During the strong shaking that can be caused by an earthquake, sands, soils, and landfill (especially if unconsolidated or water-saturated) may liquefy. This process, which can cause considerable damage, is called liquefaction.