- The quality of being incompressible, of not compressing under pressure
- Water has a high degree of incompressibility.
- (physics) The bulk modulus or modulus of incompressibility, measured in either electron volts or dynes per square centimeter.
1997, Ignazio Bombaci, Physical Review C, volume 55, DOI:Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30:
- The value 120 MeV for the incompressibility is unrealistically small when compared with the value ~180-240 MeV!