stepbrother stepbairn • stepbrotherhood · · · Info · Definitions · Synonyms · Characters · · stepbrother · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a brother who has only one parent in common with you. Synonyms: half-brother, half brother. · · Noun Definition 1 Synonyms · · · half-brother · · Synonym 1 half brother · · Synonym 2 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 h latin small letter h U+0068 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