Meaning of USPS blue box | Babel Free
Definitions
Synonym of mailbox; a designated box for outgoing mail found at post offices and on street corners.
US
Examples
“See also: blue box”
CEFR level
C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
This word is part of the CEFR C1 vocabulary — advanced level.