po box no po box • po box number · · · Info · Definitions · Synonyms · Characters · · po box no · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) the number of a letter box at the post office where mail is collected. Synonyms: post-office box number, PO box number, PO Box No, box number. · · Noun Definition 1 Synonyms · · · post-office box number · · Synonym 1 po box number · · Synonym 2 box number · · Synonym 3 Characters · · space U+0020 b latin small letter b U+0062 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 x latin small letter x U+0078