What does the word but mean?

Usage examples for but

  1. But she did not. – Lonesome Land by B. M. Bower
  2. " No; but I'll tell you what I do want. – Calvary Alley by Alice Hegan Rice
  3. Fidelia did not say much, but she said just the right thing in the right way when the time came. – Eunice by Margaret Murray Robertson