1. A reference to someone who is skillful and competent: Rodger's legal case was handled by two able lawyers.

Laureen Logan is one of the ablest lawyers who is qualified to defend Harley in the misdemeanor trial.

2. Descriptive of a physical or mental condition: The starving man was barely able to walk.
3. Having the necessary means to do something: Because of the bankrupt situation in Reginald's country, he didn't know how he would be able to survive during his retirement.