box beam box barrow • box bed · · · Info · Definitions · Synonyms · Characters · · box beam · · Text Common · · Latin · · Scripts 8 · · Length 2 · · 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 girder · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 m latin small letter m U+006D o latin small letter o U+006F x latin small letter x U+0078