1. crown prince
Wikipedia definition
2. Crown princeA crown prince or crown princess is the heir or heiress apparent to the throne in a royal or imperial monarchy. The wife of a crown prince is also titled crown princess. The term is now borne as a title only in Thailand and the Scandinavian monarchies; but it may also be used generically to refer to the person or position of the heir apparent in other kingdoms. However, heirs apparent to non-imperial and non-royal monarchies (i.e.
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