Definition
The Prince of Wales is the title traditionally conferred upon the eldest son of the English — now British — sovereign, identifying him as heir apparent to the crown. The title is not automatic by birth but is granted by letters patent or investiture, though by longstanding convention it has been consistently bestowed upon the eldest son of the reigning monarch. As heir apparent, the Prince of Wales holds a legally distinct position from other members of the royal family: he is the person in being with the nearest and most certain right of succession to the throne, whose claim cannot be defeated by a subsequent birth.
The title carries constitutional significance beyond ceremonial recognition. The Prince of Wales is, at law, a corporation sole in certain respects, capable of holding estates and exercising rights attached to the Duchy of Cornwall — the principal territorial endowment of the heir apparent under English law. The Duchy and the title, while historically intertwined, are technically distinct: the Duchy of Cornwall vests automatically in the eldest son of the sovereign upon that son's birth or the sovereign's accession, whereas the Prince of Wales title is formally conferred.
Common Language
Modern common usage (Wiktionary): A royal title given to the male heir apparent to the reigning monarch of the United Kingdom.
Historical common usage (Webster's 1913): The title is used in ordinary speech to refer to the eldest son of the British sovereign.
The gap between common and legal meaning is narrow but meaningful. In ordinary use, the title is treated as though it attaches automatically by virtue of birth order. In law, it is a dignity conferred by the Crown and can, in principle, be withheld or granted to a person other than the eldest son. The legal significance of the title also extends to property rights, parliamentary standing, and succession law in ways that common usage does not capture.
Common Confusion
The Prince of Wales should not be conflated with the Duchy of Cornwall, though the two are closely associated. The Duchy is a landed estate and revenue source that vests in the eldest son of the sovereign by operation of law; the title Prince of Wales is separately conferred. A sovereign's eldest son may hold the Duchy before being formally invested as Prince of Wales. The two also differ in legal character: the Duchy involves property and revenue rights governed by statute and common law, while the title is a dignity of the Crown.
Why It Matters in Research
Researchers encountering this term in historical legal sources should be attentive to several points. First, the legal literature treats the Prince of Wales primarily in the context of succession law and Crown prerogative — sources dealing with the title in isolation are rare; it appears most often as a component of discussions about the heir apparent, the Duchy of Cornwall, or the law of royal dignities.
Second, the phrase "heir apparent" is definitionally embedded in every historical dictionary treatment of this title. Researchers should follow that thread directly: the distinction between heir apparent and heir presumptive carries significant legal weight, and the Prince of Wales is the paradigm case of the former. Sources on succession law will be more legally substantive than sources cataloguing the title itself.
Third, the maxim quoted in Rapalje & Lawrence — Princeps legibus solutus est — appears in this entry as a Latin law tag associated with the civil law term princeps (emperor), not with the English Prince of Wales. Researchers should not read this maxim as applicable to the heir apparent under English common law. The English Prince of Wales is fully subject to law; the civilian concept of the emperor above the law is a separate doctrinal tradition entirely.
Fourth, for post-1999 researchers, devolution has added a jurisdictional layer: the title Prince of Wales references Wales specifically, but the legal governance of Wales now operates under a distinct constitutional framework from that assumed by older sources.
Historical Dictionary Support
All three source dictionaries — Black's, Rapalje & Lawrence, and Bouvier — give substantively identical definitions: the eldest son of the English sovereign; the heir apparent to the crown. The uniformity reflects that this was, in the period of these dictionaries' composition, an uncontested and stable legal status.
Rapalje & Lawrence expands the entry usefully by appending the civil law term PRINCEPS along with two maxims from the Digest and Coke's Reports. This placement is organizational rather than doctrinal — the civil law emperor and the English heir apparent are distinct figures — but the juxtaposition illuminates the broader conceptual vocabulary around sovereign authority available to legal writers of the period.
What the historical dictionaries collectively omit is any treatment of the mechanics of conferral, the Duchy of Cornwall's relationship to the title, or the constitutional functions the Prince of Wales may exercise (including, historically, the capacity to act under letters patent during a royal minority or incapacity). Researchers needing that level of detail must go beyond dictionary sources to constitutional law treatises and parliamentary records.
Jurisdictional Note
This is a title specific to the law of the United Kingdom and its constitutional antecedents under English law. It has no direct counterpart in other common law jurisdictions. Commonwealth nations that retain the British monarch as head of state do not separately confer or recognize the title in their domestic law.