• Interpenetration (Christianity), a term in Christian theology (bka Perichoresis
  Perichoresis
  Perichoresis is a term in Christian theology first found within the Church Fathers but now reinvigorated among contemporary figures such as C. Baxter Kruger, Jurgen Moltmann, Miroslav Volf and John Zizioulas, amongst others. The term first appears in Gregory of Nazianzus but was explored more...
  
   or Circuminsession) that refers to the mutual inter-penetration and indwelling within the threefold nature of the Trinity, God the Father, the Son and the Holy Spirit.
• Interpenetration (Buddhism), a concept of Buddhist philosophy proposed in the Avatamsaka Sutra
• Interpenetration, in computer 3D modelling collision detection
  Collision detection
  Collision detection typically refers to the computational problem of detecting the intersection of two or more objects. While the topic is most often associated with its use in video games and other physical simulations, it also has applications in robotics...
  
  , where two objects collide and become stuck

See also

• Impenetrability
  Impenetrability
  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 contention strongly disputed by Gottfried Wilhelm...
  
  , that quality of matter whereby two bodies cannot occupy the same space at the same time
• Penetration (disambiguation)