1.The act of springing back, rebounding, or resiling; as, the resilience of a ball or of sound.
2.The power or inherent property of returning to the form from which a substance is bent, stretched, compressed, or twisted; elasticity(1); springiness; of objects and substances.
3.Hence: The power or ability to recover quickly from a setback, depression, illness, overwork or other adversity; buoyancy; elasticity(2); of people.
4.(Mech. & Engin.) The mechanical work required to strain an elastic body, as a deflected beam, stretched spring, etc., to the elastic limit; also, the work performed by the body in recovering from such strain.
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