What does the word reckon mean?

Usage examples for reckon

  1. Well, I reckon not! – Patty's Social Season by Carolyn Wells
  2. I reckon I was myself at your age. – Jimmy Kirkland and the Plot for a Pennant by Hugh S. Fullerton
  3. The old 'un May reckon with some of 'em yet. – The Man from Snowy River by Andrew Barton 'Banjo' Paterson