This is the 2567th most frequent French word.
halifax
"Halifax" is not a French word; it refers to a city in Canada.
Here, 'Halifax' is used as a proper noun, referring to the name of a specific location.
Halifax est une ville située en Nouvelle-Écosse, au Canada.
Halifax is a city located in Nova Scotia, Canada.
In this sentence, 'Halifax' is again used as a proper noun to denote the city being visited.
Nous avons visité Halifax pendant les vacances d'été.
We visited Halifax during the summer holidays.
'Halifax' is used here as a proper noun indicating the city where the post office is located.