平野

(1)extensive tract of level open land; "they emerged from the woods onto a vast open plain"; "he longed for the fields of his youth"

(2)平らで開けた土地の広範囲に及ぶ地帯

(3)a type of soil occurring under grasses in temperate climates

(4)温暖気候の草原の下に存在する土壌の種類