Fehler

noun
  1. An error or mistake, typically one made in a process or calculation. noun
    The software update fixed several critical errors that were causing system crashes.
    He realized he had made a mistake in his calculations, which led to the wrong conclusion.
  2. A fault or defect in a machine or system. noun
    The technician identified a fault in the engine that needed immediate repair.
    Due to a defect in the manufacturing process, the product was recalled.