Pronunciation: (in-kā'pu-bul),[key] —adj. 1. not capable.
2. not having the necessary ability, qualification, or strength to perform some specified act or function: As an administrator, he is simply incapable. 3. without ordinary capability; incompetent.
4. incapable of, a. not having the ability, qualification, or strength for (a specified act or function).
b. not open to; not susceptible to or admitting: These materials are incapable of exact measurement. c. legally unqualified for.
—n. a thoroughly incompetent person, esp. one of defective mentality.