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