box girder box gauge • box grave · · · Info · Definitions · Synonyms · Characters · · box girder · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) a beam built up from boards; has a hollow rectangular cross section. Synonyms: box beam, box girder. · · Noun Definition 1 Synonyms · · · box beam · · Synonym 1 Characters · · space U+0020 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 x latin small letter x U+0078