What does the word reins mean?

Usage examples for reins

  1. The man smiled and said, " How can that be done, thou art far too small to lead the horse by the reins?" – Household Tales by Brothers Grimm by Grimm Brothers
  2. " Try and remember it," Thompson bade him, and lifted his reins. – The Heart of the Range by William Patterson White
  3. No; you hold the reins, and I'll look for him and see what is just before us. – Driven Back to Eden by E. P. Roe