1. Lack of ability, skill, or knowledge to perform a task or fulfill a responsibility
The manager's incompetence led to the project's failure.
A incompetência do gerente levou ao fracasso do projeto.
2. Legal term: lack of authority or jurisdiction to hear a case
The court ruled on its incompetence to judge the matter.
O tribunal pronunciou-se sobre sua incompetência para julgar o assunto.
3. Professional or technical inadequacy in a specific field
His incompetence in mathematics was evident in his exam results.
Sua incompetência em matemática era evidente em seus resultados de exame.