1.Definition: (followed by `of') lacking capacity or ability

"Incapable of carrying a tune", "He is incapable of understanding the matter", "Incapable of doing the work"

2.Definition: (followed by `of') not having the temperament or inclination for

"Simply incapable of lying"

3.Definition: not being susceptible to or admitting of something (usually followed by `of')

"Incapable of solution"

4.Definition: not meeting requirements

Related Adjective(s):incompetent