What does the word expand mean?

Usage examples for expand

  1. I was now taken up with larger concerns, working furiously to expand my success and for a year after leaving the Intelligencer I doubt if I gave it more than a minute's thought a day. – Greener Than You Think by Ward Moore
  2. Now, the effect of heat upon air is to expand it, make it light, and cause it to rise. – The Ocean and its Wonders by R.M. Ballantyne