1. Anyone who has the ability to recover readily from illness, injury, depression, adversity, etc.: Cindy's resiliency after the auto accident was admired by her fellow students and teachers.
2. The power or ability of a material (metal, plastic, etc.) to return to an original form, position, etc., after being flexed, compressed, or extended; elasticity: Some fabrics; such as, wool and silk, have natural resiliency and others can be chemically treated to impart a certain amount of resiliency.