# USPS blue box

> English word · Noun

## Definitions
1. Synonym of mailbox; a designated box for outgoing mail found at post offices and on street corners.

## Etymology
From USPS + blue box.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/usps-blue-box