Metamorphism, in geology, is the solid state recrystallisation of rocks under environmental forces.

Metamorphism may also refer to:

Metamorphism (Merzbow album) (2006). Metamorphism (computer science), a concept similar to a hylomorphism. Metamorphic code, computer code that rewrites itself. Shapeshifting, the fictional topic, also called "metamorphism"

See also Metamorphosis (disambiguation)