USPS mail refers to the mail services provided by the United States Postal Service. There are various synonyms that can be used to describe USPS mail, including postal mail, snail mail, regular mail, traditional mail, and physical mail. These synonyms typically reinforce the fact that USPS mail is a tangible, physical item that is delivered through a physical mail system. Despite the growing use of electronic mail, USPS mail remains an important means of communication and delivery for many individuals and businesses across the country. Whether sending a letter, package, or other mail-related item, USPS mail is a reliable and cost-effective option for most people.