horsepower-hour horsepower • horsepower-year · · · Info · Definitions · Characters · · horsepower-hour · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) a unit of work equal to the work done by one horsepower in one hour. · · Noun Definition 1 Characters · · - hyphen-minus U+002D e latin small letter e U+0065 h latin small letter h U+0068 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075 w latin small letter w U+0077