What is the meaning of the word "a hundred and ten percent"?

Definitions:

  1. A level of effort beyond what one can usually sustain; great exertion. copy to clipboard noun
    • When I ball, I give a hundred and ten percent. copy to clipboard
  2. An effort toward something that is greater than one believes is capable of doing. copy to clipboard NOUN
    • If you not willing to give a hundred and ten percent, we don't need you on this team. copy to clipboard
  3. To give extra effort beyond 100 percent. copy to clipboard NOUN
    • We are going to have to give 110 percent if we want to get this project finished by the deadline. copy to clipboard