Definition of heir apparent noun from the Oxford Advanced Learner's Dictionary

     

    heir apparent

     noun
    noun
    BrE
     
    ; NAmE
     
    (pl. heirs apparent)heir apparent (to something)
     
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  1. 1an heir whose legal right to receive somebody’s property, money or title cannot be taken away because it is impossible for somebody with a stronger claim to be born
  2. 2a person who is expected to take the job of somebody when that person leaves
See the Oxford Advanced American Dictionary entry: heir apparent