The lack of ability, skill, or knowledge to perform a task or job effectively. The team's incompetence was evident when they failed to complete the project on time.
The state or condition of being unable to do something successfully. His incompetence in handling the situation led to further complications.
The lack of legal capacity or qualification to perform an act. The court declared the contract void due to the incompetence of one of the signatories.
Failure of a bodily organ, valve, or other anatomical structure to function properly. Mitral valve incompetence can lead to heart failure.