post-office box number post-office box • post-officer · · · Info · Definitions · Synonyms · Characters · · post-office box number · · Text Common · · Latin · · Scripts 22 · · Length 6 · · 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 · · · po box number · · Synonym 1 po box no · · Synonym 2 box number · · Synonym 3 Characters · · space U+0020 - hyphen-minus U+002D b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078