earned run average earned run • earner · · · Info · Definitions · Synonyms · Characters · · earned run average · · Text Common · · Latin · · Scripts 18 · · Length 5 · · Syllables Definitions · · · (noun) (baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched. Synonyms: earned run average, ERA. · · Noun Definition 1 Synonyms · · · era · · Synonym 1 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 g latin small letter g U+0067 n latin small letter n U+006E r latin small letter r U+0072 u latin small letter u U+0075 v latin small letter v U+0076