What does the word ambitious mean?

Usage examples for ambitious

  1. I don't see any use in being ambitious and taking any stock at all in anything so far as I am concerned, but I do hate to see the government come to harm. – Cupid's Middleman by Edward B. Lent
  2. Oh, what would he not have given for a couple more rolls of a dozen exposures each; just then they would have been worth their weight in silver to the ambitious photographer. – The Boy Scouts with the Motion Picture Players by Robert Shaler