The adj able has 4 senses (first 3 from tagged texts)
1. (70) able -- ((usually followed by `to') having the necessary means or skill or know-how or authority to do something; "able to swim"; "she was able to program her computer"; "we were at last able to buy a car"; "able to get a grant for the project")
2. (7) able, capable -- (have the skills and qualifications to do things well; "able teachers"; "a capable administrator"; "children as young as 14 can be extremely capable and dependable")
3. (4) able -- (having inherent physical or mental ability or capacity; "able to learn"; "human beings are able to walk on two feet"; "Superman is able to leap tall buildings")
4. able, able-bodied -- (having a strong healthy body; "an able seaman"; "every able-bodied young man served in the army")