The person who is next to inherit a monarch's position after the monarch's death or abdication. Usually, this is the ruler's eldest child.
example
Der Prinz wird als offizieller Thronfolger auf seine zukünftigen Aufgaben vorbereitet.
The prince is being prepared for his future duties as the official heir to the throne.
Usage tips
Compound word
The word is made up of 'Thron' (throne) and 'Folger' (follower/successor). A 'Folger' is someone who follows after someone else, from the verb 'folgen' (to follow). A 'Thronfolger' is therefore literally the person who follows on the throne.
EXAMPLE
Als Thronfolger musste der junge Prinz viele Sprachen lernen.
As heir to the throne, the young prince had to learn many languages.
Context is crucial
You can tell from context whether the literal or figurative meaning is intended. Words like 'Königreich' (kingdom) or 'Prinz' (prince) point to a monarchy. Words like 'Firma' (company), 'Partei' (party), or 'Chef' (boss) point to succession in an organization.
EXAMPLE
Der älteste Sohn des Königs ist der Thronfolger.
The king's eldest son is the heir to the throne.
Figurative meaning
In the figurative sense, 'Thronfolger' (successor) is often used ironically or metaphorically for the designated successor in a powerful position in business or politics.
EXAMPLE
In den Medien wird bereits über den möglichen Thronfolger des alternden Firmengründers spekuliert.
The media are already speculating about the possible successor to the aging company founder.
Compare with
near_synonym
Thronfolger vs Nachfolger
successor
'Nachfolger' and 'Thronfolger' both refer to a person who later takes over an important position. 'Nachfolger' is the general word and fits many areas, for example a company, an association, or an office. 'Thronfolger' is much more specific: it actually refers to the person who will one day become king or queen. Figuratively, it can also be used for someone who is intended to be the next leader. If it is not about a throne or a very important top position, 'Nachfolger' sounds more natural.
Thronfolger
Der junge Prinz gilt seit seiner Geburt als Thronfolger.
The young prince has been considered the heir to the throne since his birth.
Nachfolger
Karim wird im Sommer der Nachfolger des Trainers.
Karim will become the coach's successor in the summer.