Cavitation is the formation of vapour cavities in a liquid.

Cavitation may also refer to:

• Cavitation (embryology), the formation of cavities in an organ
• Cavitation (lung), an air pocket in the lung
• Cavitation (bone), an area of dead bone
• Cavitation (elastomers), the unstable expansion of a microscopic void in a solid elastomer under the action of tensile hydrostatic stresses
• Cavitation, a void in tissue resulting from penetrating trauma