dark horse darkheartedness • dark-hued · · · Info · Definitions · Characters · · dark horse · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) a political candidate who is not well known but could win unexpectedly. Synonyms: dark horse. · · Noun Definition 1 (noun) a racehorse about which little is known. Synonyms: dark horse. · · Noun Definition 2 Characters · · space U+0020 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 k latin small letter k U+006B o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073