failure

noun
  1. The lack of success in doing or achieving something. noun
    The project was a complete failure because it did not meet any of its objectives.
    After several failures, she finally passed the driving test.
  2. An instance of a machine or system not functioning as intended. noun
    The engine failure caused the plane to make an emergency landing.
    There was a power failure during the storm, leaving the entire neighborhood in darkness.
  3. A person who is unsuccessful in a particular activity or endeavor. noun
    He felt like a failure after his business went bankrupt.
    Despite her efforts, she was labeled a failure by her critics.
  4. The omission of expected or required action. noun
    His failure to submit the report on time resulted in a penalty.
    Failure to comply with the safety regulations can lead to severe consequences.
  5. A state of not functioning or operating properly. noun
    The failure of the cooling system led to the overheating of the reactor.
    Heart failure is a serious condition that requires medical attention.