PO Box No

3.5

A number for a post office box where you collect mail

noun

: apartado de correos No

Please send your completed application to PO Box No 12345, New York, NY 10001.

Examples

All correspondence should be addressed to PO Box No 678, London SW1A 1AA.
Please send your documents to PO Box No 456, Chicago, IL 60601.
They rented a PO Box No to securely receive important mail.
Send it to PO Box No 12345.
I have a PO Box No for my business.
All packages should be sent to PO Box No 789, San Francisco, CA 94102.
You can contact me via mail at PO Box No 321, Miami, FL 33101.

Synonyms

box number

vsPO Box No

1 3.0

A number for a mailbox at a post office where someone receives mail

is specific to boxes located at a post office

post-office box number

vsPO Box No

1 2.1

A number used to receive mail at a post office box

is identical in meaning but written without hyphens

PO box number

vsPO Box No

2.7

A number for a box at the post office where you receive mail

has identical meaning but differs only in wording

Surface Forms

PO Box No singular

PO Box Nos plural

Morphology

PO + box + no

The meaning is directly compositional: PO (post office) + box (a receptacle) + No (number) yields the identifying number for a post-office box. This follows straightforward noun compounding and numbering conventions (seen cross-linguistically), so a B1 learner who knows the constituents would readily infer the MWE's meaning.

Etymology

PO Box No comes from the simple idea of a small locked Box at the PO 'post office' that has a No 'number' on it. So the phrase means the number that tells postal workers which box to put your mail in.