What does the word guard mean?

Usage examples for guard

  1. I will keep guard till you are over." – Night and Morning, Volume 3 by Edward Bulwer Lytton
  2. The guard stood aside. – Astounding Stories of Super-Science, March 1930 by Various
  3. Achish said to David, " In that case I will make you the captain of my body- guard from this time on." – The Children's Bible by Henry A. Sherman Charles Foster Kent