Определение heir apparent в Английский Язык Английский Язык словарь
Someone who will definitely inherit, assuming he survives the one from whom he is inheriting
The heir apparent to a particular job or position is the person who is expected to have it after the person who has it now. An heir whose right to inheritance is indefeasible by law provided he or she survives an ancestor
heir whose right to receive an inheritance cannot be changed by the birth of another heir as long as he or she outlives that person (Law); person who is expected to inherit the position or status of another
an heir whose right to an inheritance cannot be defeated if that person outlives the ancestor