1.Definition: (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.Definition: 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.Definition: having a strong healthy body
"An able seaman", "Every able-bodied young man served in the army"
4.Definition: 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"