Noah Webster's New International Dictionary of the English Language
1. (superl.) Fit; adapted; suitable.
2. (superl.) Having sufficient power, strength, force, skill, means, or resources of any kind to accomplish the object; possessed of qualifications rendering competent for some end; competent; qualified; capable; as, an able workman, soldier, seaman, a man able to work; a mind able to reason; a person able to be generous; able to endure pain; able to play on a piano.
3. (superl.) Specially: Having intellectual qualifications, or strong mental powers; showing ability or skill; talented; clever; powerful; as, the ablest man in the senate; an able speech.
4. (superl.) Legally qualified; possessed of legal competence; as, able to inherit or devise property.
5. (v.) To make able; to enable; to strengthen.
6. (v.) To vouch for.
7. (n.) An adjective suffix now usually in a passive sense; able to be; fit to be; expressing capacity or worthiness in a passive sense; as, movable, able to be moved; amendable, able to be amended; blamable, fit to be blamed; salable.