Meaning of “heir” in the English Dictionary

"heir" in British English

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heirnoun

uk /r/ us /er/

C2 [ C ] a person who will legally receive money, property, or a title from another person, especially an older member of the same family, when that other person dies:

The guest of honour was the Romanov heir to the throne of all Russia.
Despite having a large family, they still had no son and heir.
See also

[ C usually singular ] someone who now has responsibility for dealing with a problem or situation that existed or was created earlier:

The French finance minister is heir to a tradition of central control that goes back to Louis XIV.

[ C usually singular ] someone who continues to do the work of someone important who has died, or someone who has the same position as the previous person who held that position

(Definition of “heir” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"heir" in American English

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heirnoun [ C ]

us /eər/ female heiress, /ˈeər·əs/

a person who will receive or already has received money or property from another person at the time of that other person’s death:

My cousin Robert is the only heir to my uncle’s fortune.

(Definition of “heir” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"heir" in Business English

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heirnoun [ C ]

uk /r/ us

LAW the person who legally receives money, property, or possessions from someone who has died:

Court documents showed that each heir was entitled to land and shares of stock in the businesses.
heir to sth When her father died, she became the sole heir to his £40,000 estate.
heir of sth The heirs of the company's founder control about 39% of the business.

someone who becomes the new leader of a large organization or company after the old leader leaves:

heir to sb He was a potential heir to retiring CEO Jack Welch.

(Definition of “heir” from the Cambridge Business English Dictionary © Cambridge University Press)