post office box

noun

: a box at a post office where a person or business can have mail delivered

Browse Nearby Words

post-office address
post office box
post-office car
See all Nearby Words

Cite this Entry

“Post office box.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/post%20office%20box. Accessed 2 Jul. 2026.

Copy Citation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of sagacious

See Definitions and Examples »

Popular in Grammar & Usage

See More

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

Why does English have so many silent letters?

Every Letter Is Silent, Sometimes: A-Z List of Examples

More Commonly Mispronounced Words
See More

Popular in Wordplay

See More

Did 'orange' the fruit or the color come first?

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

Words from the 'Odyssey'
See More

Popular

See More

5 Verbal Slip Ups and Language Mistakes

Did 'orange' the fruit or the color come first?

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
tiny woman sitting on a pile of books reading
Little Words, Big Vocabulary Quiz Time to sweat the small stuff.
See All