barbacan barb • Barbacoa · · · Info · Definitions · Synonyms · Characters · · barbacan · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) a tower that is part of a defensive structure (such as a castle). Synonyms: barbican. · · Noun Definition 1 Synonyms · · · barbican · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 n latin small letter n U+006E r latin small letter r U+0072