- having an even and regular surface; free from perceptible projections, lumps, or indentations（表面）光滑的, 平滑的：
smooth flat rocks.
平坦光滑的岩石。
- (of a person's face or skin) not wrinkled, pitted, or hairy（脸, 皮肤）光滑的：
a smooth skin tans more easily.
光滑的皮肤更容易被晒黑。
- (of a liquid) with an even consistency; without lumps（液体）细腻的; 均匀的：
cook gently until the sauce is smooth.
慢慢地煮直到调料变匀和。
- (of the sea or another body of water) without heavy waves; calm（海洋, 其他水体）无风浪的, 平静的：
the smooth summer sea.
平静的夏日海洋。
- (of movement) without jerks（动作）平稳的：
the trucks gave a smooth ride
卡车平稳地行驶
graphics are excellent, with fast, smooth scrolling.
图像精美, 滚屏快速顺畅。
- (of an action, event, or process) without problems or difficulties（动作, 事件, 过程）顺利的：
the group's expansion into the US market was not quite so smooth.
该集团向美国市场的扩展并非一帆风顺。
- denoting the face of a tennis or squash racket without the projecting loops from the stringing process (used as a call when the racket is spun to decide the right to serve first or to choose ends)（网球拍或软式壁球拍无线结的一面, 在决定谁先发球或选择场地转动球拍时作判定口令用的）光面, 滑面。
- (of food or drink) without harshness or bitterness（食品, 饮料）醇和的, 不苦的：
a lovely, smooth, very fruity wine.
味道醇和, 果味浓厚, 非常爽口的葡萄酒。
- (of a person or their manner, actions, or words) suavely charming in a way considered to be unctuous（人或其态度、动作、言语）圆滑的, 油腔滑调的, 迎合讨好的：
his voice was infuriatingly smooth.
他的声音油腔滑调, 令人恼怒。
- give (something) a flat, regular surface or appearance by running one's hand over it抚平, 弄平滑：
she smoothed out the newspaper.
她把报纸抚平。
- rub off the rough edges of (something)磨平：
you can use glasspaper to smooth the joint.
你可以用砂纸把接缝处磨平。
- deal successfully with (a problem, difficulty, or perceived fault)成功地解决（问题, 困难, 发现的错误）：
these doctrinal disputes were smoothed over.
这些学说间的争论已经平息了。
- free (a course of action) from difficulties or problems消除（行动）障碍, 为…铺平道路：
a conference would be held to smooth the way for the establishment of the provisional government.
将要召开一次会议为建立临时政府铺平道路。
- modify (a graph, curve, etc.) so as to lessen irregularities修改（图表、曲线等）以减少不规则现象：
values are collected over a long period of time so that fluctuations are smoothed out.
数值是在很长的时间段内收集的, 所以波动起伏被修匀了。
- archaic in a way that is without difficulties〈古〉顺利地：
the course of true love never did run smooth.
真正的爱情从来不是一帆风顺的。
smooth someone's ruffled feathers
- 见RUFFLE.