Definitions for "Metamorphism"
The state or quality of being metamorphic; the process by which the material of rock masses has been more or less recrystallized by heat, pressure, etc., as in the change of sedimentary limestone to marble.
The process of changing the characteristics of a rock in response to changes in temperature, pressure or volatile content.
(in Geology) The changes in the composition and textures of rock, caused by pressure, heat, and moisture. It results in a more compact and more highly crystalline condition.