What does "courtesy title" mean?

A person's title that has no legal validity but is used through custom or courtesy, particularly for children of the nobility.

What is a synonym for "courtesy title"?

Common synonyms include: dons, esq, esquire, honorifics, sir.

noun

noun ·Rare ·Advanced level

Noun

1
A person's title that has no legal validity but is used through custom or courtesy, particularly for children of the nobility.