This is the 5385th most frequent French word.
baron
A nobleman of low rank; a title of nobility.
Here, 'baron' is used in its historical sense to refer to a noble title, indicating a wealthy landowner.
Le baron possédait un vaste domaine dans le sud de la France.
The baron owned a vast estate in the south of France.
In this instance, 'baron' is metaphorically applied to mean someone who holds significant influence and power in a particular field.
Il est un véritable baron dans le monde de la finance.
He is a true baron in the world of finance.
This shows a playful or imaginative usage, as children pretend to be noble figures during their games.