[I, Ipr] ~ (at sb/sth) bring the eyebrows together, so wrinkling the skin on one's forehead (to express anger, thought, worry, etc) 皱眉, 蹙额（以示生气﹑ 沉思﹑ 忧愁等）: What's wrong? Why are you frowning? 出什麽事了? 干什麽皱着眉头? * Peter frowned at the noise coming from the boys' bedroom. 彼得听到从男孩子卧室传来的吵闹声便皱起眉头. * She read through the letter, frowning at its contents. 她把信看了一遍, 从头到尾双眉深锁. 
(phr v) frown on/upon sth disapprove of sth 不赞成某事; 不许可; 不同意: My parents always frown on late nights out. 我父母向来不赞成深夜外出. * Gambling is frowned upon by some church authorities. 有些教会权力机关不许可赌博. =>Usage at smirk 用法见smirk.> frown n serious, angry, worried, etc look on the face causing lines on the forehead; expression of displeasure 皱眉; 蹙额; 不悦: She looked up from her exam paper with a worried frown. 她看完自己的试卷愁眉不展地抬起头来. * I noticed a slight frown of disapproval on his face. 我留意到他轻轻皱了一下眉, 露出不赞成的样子.