Noun heir has 2 senses
  1. heir, inheritor, heritor - a person who is entitled by law or by the terms of a will to inherit the estate of another
    --1 is a kind of recipient, receiver
    --1 has particulars:
     heir apparent; heir-at-law; heiress, inheritress, inheritrix; heir presumptive
  2. successor, heir - a person who inherits some title or office
    --2 is a kind of offspring, progeny, issue
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