what is a gangster
Full Definition of GANGSTER. : a member of a gang of criminals: racketeer. â gangÂ·sterÂ·dom \-dÉm\ noun. â gangÂ·sterÂ·ish \-stÉ-rish\ adjective. â gangÂ·sterÂ·ism \-stÉ-Ëri-zÉm\ noun. See gangster defined for English-language learners. See gangster defined for kids.ull Definition of GANGSTER. : a member of a gang of criminals: racketeer. â gangÂ·sterÂ·dom \-dÉm\ noun. â gangÂ·sterÂ·ish \-stÉ-rish\ adjective. â gangÂ·sterÂ·ism \-stÉ-Ëri-zÉm\ noun. See gangster defined for English-language learners. See gangster defined for kids.