nobody
The French word 'personne' translates to 'nobody' in English. It is often used to express the absence of any person. In a sentence, it can be used like 'Il n'y a personne' which means 'There is nobody'. Remember to use it with 'ne' in negative sentences.
There is one person in the room.
In this context, 'personne' is used to refer to an individual or a single person. 'Il y a une personne...' translates to 'There is one person...'. This sentence is not in a negative form therefore 'personne' simply means 'person'.