Rightful \Right"ful\, a.
   1. Righteous; upright; just; good; -- said of persons. [Obs.]
      --Chaucer.
      
[1913 Webster]


   2. Consonant to justice; just; as, a rightful cause.
      
[1913 Webster]


   3. Having the right or just claim according to established
      laws; being or holding by right; as, the rightful heir to
      a throne or an estate; a rightful king.
      
[1913 Webster]


   4. Belonging, held, or possessed by right, or by just claim;
      as, a rightful inheritance; rightful authority.
      
[1913 Webster]


   Syn: Just; lawful; true; honest; equitable; proper.
        
[1913 Webster]