cleanthes clean-sweeping • clean-thinking · · · Info · Definitions · Characters · · cleanthes · · Text Latin · · Script 9 · · Length 2 · · Syllables Definitions · · · (noun) ancient Greek philosopher who succeeded Zeno of Citium as the leader of the Stoic school (300-232 BC). Synonyms: Cleanthes. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074