roundhead roundfish • roundheaded · · · Info · Definitions · Characters · · roundhead · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a brachycephalic person. · · Noun Definition 1 (noun) a supporter of parliament and Oliver Cromwell during the English Civil War. Synonyms: Roundhead. · · Noun Definition 2 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075