noun (n)

• the tendency of a body to return to its original shape after it has been stretched or compressed(noun.attribute)

  Synonym:
  snap
  Antonym:
  inelasticity
  

  source: wordnet30
• The quality of being elastic; the inherent property in bodies by which they recover their former figure or dimensions, after the removal of external pressure or altering force; springiness; tendency to rebound; as, the elasticity of caoutchouc; the elasticity of the air.(noun)

  source: webster1913