postaux

Postaux is the masculine plural form of the French adjective postal, used to describe things related to the postal system or mail delivery. It appears in common administrative and logistical terms such as codes postaux (postal codes) and services postaux (postal services). The adjective can also attach to masculine plural nouns, for example matériels postaux (postal equipment) or réseaux postaux (postal networks).

The feminine forms are postale (singular) and postales (plural), as in adresse postale (postal address) or boîtes postales (P.O. boxes). In everyday usage, postaux tends to function as an attributive adjective rather than as a standalone noun.

Usage varies by region but is standard across French-speaking areas, including France, Belgium, Switzerland, Canada, and parts of Africa. The term derives from the noun poste (the postal service) and the Latin root postalis, with the usual French morphological pattern that adjectives ending in -al form a plural ending -aux in the masculine plural. This explains the spelling shift from postal to postaux in plural contexts.

Related terms include adresse postale, boîte postale, et réseau postal, which are commonly encountered in mail handling, geography, and administrative addressing. Overall, postaux serves as a key linguistic marker for postal-related description in French.