What does the word bet mean?

Usage examples for bet

  1. An' when the right man comes, why, she knows 'im, you bet! – The Girl of the Golden West by David Belasco
  2. " I'll bet he is seeing action," Allison said. – A Yankee Flier in Italy by Rutherford G. Montgomery
  3. I'll bet they're hiding something. – Concerning Sally by William John Hopkins