| Noun | 1. | incapacity - lack of intellectual power inability - lack of ability (especially mental ability) to do something mental ability, capacity - the power to learn or retain knowledge; in law, the ability to understand the facts and significance of your behavior |
| 2. | incapacity - lack of physical or natural qualifications incapability, incapableness - the quality of not being capable -- physically or intellectually or legally capacity - capability to perform or produce; "among his gifts is his capacity for true altruism"; "limited runway capacity"; "a great capacity for growth" |