What does the word rightful mean?

Usage examples for rightful

  1. " He was my rightful king and lord, and I owed him allegiance. – Berlin and Sans-Souci by Louise Muhlbach
  2. The Lollards were strengthened in their resistance to the government of the house of Lancaster by the rumour that their rightful King was yet alive. – A History of England Principally in the Seventeenth Century, Volume I (of 6) by Leopold von Ranke