平地一声雷 píngdìyīshēngléi to have a sudden great success Origin Definitions Defs Strokes Stroke Words Sentences Sents 平地 píngdì level ground flat or level ground; a plain一声 一聲 yīshēng numeralnoun a sound a sound; a noise; a single utterance雷 léi noun thunder thunder; the loud noise caused by atmospheric electrical discharge