DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   heir
       n 1: a person who is entitled by law or by the terms of a will
            to inherit the estate of another [syn: heir, inheritor,
            heritor]
       2: a person who inherits some title or office [syn: successor,
          heir]