通宵达旦tōngxiāodádànTop 45000Meanings1. overnight until daybreak (idiom); all night long2. day and nightCharacters used通to go through宵night达to reach旦danExamples1全体quántǐ销售xiāoshòu人员rényuán通宵达旦tōngxiāodádàn地de工作gōngzuò了le一周yīzhōu。The entire sales staff has worked around the clock for a week.