Interpenetration, in computer 3D modelling collision detection, is where two objects collide and become stuck inside one another, unable to separate

Interpenetration, in chemistry, or interdiffusion of at least two gas, liquid, or solid phases to a mixture

Interpenetration, classical musical pieces by Joji Yuasa

In metaphysics, impenetrability is the name given to that quality of matter whereby two bodies cannot occupy the same space at the same time. The philosopher John Toland argued that impenetrability and extension were sufficient to define matter, a...

Interpenetration, a concept of Buddhist philosophy proposed in the Avatamsaka Sutra.