1.NounThe act of deforming, or state of being deformed.
Physically so.
"plastic deformation versus elastic deformation; permanent deformation; The metal showed signs of deformation under stress.; Earthquakes can cause severe ground deformation."
2.NounPhysically so.
"plastic deformation versus elastic deformation; permanent deformation; The metal showed signs of deformation under stress.; Earthquakes can cause severe ground deformation."