一马平川 yīmǎpíngchuān wide expanse of flat land Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral one one; the number 1; single; alone马 馬 mǎ noun horse horse; any animal of the horse family; large mammal used for riding, pulling carts, or farm work平川 píngchuān plain an expanse of flat and open land; flat country