Pronunciation: (fāl'yur),[key] —n. 1. an act or instance of failing or proving unsuccessful; lack of success: His effort ended in failure. The campaign was a failure. 2. nonperformance of something due, required, or expected: a failure to do what one has promised; a failure to appear. 3. a subnormal quantity or quality; an insufficiency: the failure of crops. 4. deterioration or decay, esp. of vigor, strength, etc.: The failure of her health made retirement necessary. 5. a condition of being bankrupt by reason of insolvency.
6. a becoming insolvent or bankrupt: the failure of a bank. 7. a person or thing that proves unsuccessful: He is a failure in his career. The cake is a failure.