What does the word let mean?

Usage examples for let

  1. Let Gran'vaither bide, du'ye. – Furze the Cruel by John Trevena
  2. Don't let her see that you think anything is wrong- and don't say anything about us. – Sawtooth Ranch by B. M. Bower
  3. Do you think I will let you go alone? – A Terrible Secret by May Agnes Fleming