third-rail third party • third-rate · · · Info · Definitions · Characters · · third-rail · · Text Common · · Latin · · Scripts 10 · · Length Definitions · · · (noun) a rail through which electric current is supplied to an electric locomotive. Synonyms: third rail. · · Noun Definition 1 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 d latin small letter d U+0064 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074