1. Ability of a material to resume its original size and shape after deformation, such as stretching, twisting, compression, or indentation. 2. The measurement of the absorption of dynamic energy by a structure without permanent deformation or fracture. 3. The property whereby a strained body gives up its stored energy on the removal of the deforming force. 4. The ability of a carpet fabric or padding to spring back to its original shape or thickness after being crushed or walked upon.