1.round的基本意思是“(使)成圆形”,引申可表示“丰满起来”“环行”“拐弯”“使集拢”“围捕”,在表示“使圆满结束”“使文体完美”时,多与off连用。
2.round既可用作及物动词,也可用作不及物动词。用作及物动词时,接名词、代词作宾语。

round into(v.+prep.)
环行; 拐弯 go in a ring
▲round into sth
The runners rounded into the home stretch.赛跑者拐弯进入了接近终点的一段距离。
The century has rounded into its ninth decade.本世纪已进入了90年代。
▲round sth into sth
The sculptor rounded the clay into a sphere.那位雕塑家把黏土做成了一个球状。

round off(v.+adv.)
1.圆满结束 finish successfully
▲round off
The performance was rounded off with an one-cat play.演出以一个独幕剧圆满结束。
Your essay needs rounding off.你的散文需要润色一下。
2.弄圆 make round
▲round sth⇔off
Take a piece of sandpaper and round off the edges of the frame.拿张砂纸把框架的边磨圆。

round out(v.+adv.)
发胖; 丰满起来 have had a well filled out figure
▲round out
Her figure is beginning to round out.她的身材正开始发胖。

round up(v.+adv.)
使集拢; 围捕 surround to seize
▲round sb/sth⇔up
This is a plan to round up the enemy spies.这是个围歼敌特的计划。

用作不及物动词
▲S+～(+A)
The bear rounded and faced the hunters.熊转过身,面对着猎人。
The child's eyes rounded with excitement.小孩子兴奋得瞪圆了眼睛。
用作及物动词
▲S+～+n./pron.
He rounded a corner and walked into a narrow street.他拐过弯走进一条狭窄的街道。
The ship rounded the cape.船绕过海岬。
We rounded the hill and saw the sea.我们绕过小山看见了海。
We rounded our lips to make the sound “uː”.我们使嘴成圆形以发uː这个音。

［派生词］ roundly adv.有力地; 广泛地‖roundness n. 圆,圆形
［同义词］ adj.  entire, fat, full, smooth n.  circle, circuit, procession, series, watch
［反义词］ adj.  broken, rough, slender, slim, thin
［词源］＜拉丁语rotundus(圆的,球形的)

do〔go〕 the rounds
到各处玩乐make a tour; visit places one after another
Whenever we go back to the place my wife was born, we always have to do the rounds of her relatives.我们每次回到我妻子出生的地方,总得挨家走访她的亲戚。

go the round of
流传,散播circulate in or among
The news quickly went the round of the town.消息很快传遍了全镇。

in the round
从所有角度(来看)in an all-round way
She can't see people in the round.她不会全面地观察人。

These are 6 whole rounds of bread.这些是六份整的面包。
Each round of the boxing match lasts three minutes.拳击比赛每回合时间是三分钟。
A round of parties ushered in the New Year.一系列的晚会迎来了新年。
His speech won round after round of enthusiastic applause.他的演讲博得了一阵又一阵的热烈掌声。
She doesn't know at all about the life round of a fly.她对苍蝇的生命周期一无所知。
The night watchman makes the rounds of the building every hour.巡夜人员每小时都巡视这建筑物。

in round figures〔numbers〕
不计尾数的,以整数表示,大概without paying attention to small amounts
The car cost ￡9878—that's ￡10,000 in round figures.这车花了9878英镑,说个整数是一万英镑。

句型例句
用作定语
▲～+n.
 The child had a round face.那孩子脸蛋圆润。
He was a short and round man.他是个矮胖的男人。
Give me a round dozen and I'll pay in cash.给我一整打,我将付现金。
What he said is a round lie.他所说的是十足的谎话。
He is clever enough to have made such a round guess.他作出了如此完整的猜测,真够聪明的了。
用作表语
▲S+be+～
 The area was perfectly round.那区域完全是圆形的。
It is neither round nor square.它既不是圆的,也不是方的。

round about
〈非正〉大约a little bit more or less than
It'll cost you round about ￡1000.那要花掉你大约1000英镑。

the other〔opposite〕 way round
in the opposite order 方向相反,倒过来
It was the other〔opposite〕 way round—the boy bit the dog!狗没有咬这个男孩,相反地这男孩咬了狗。

The horse is running round the field.马在场上兜着圈子跑。
A crowd soon gathered round.一群人马上围了上来。
He visited all the people round.他访问了附近所有的人。
Spring came round.春天来了。
What are you hanging round for?你在这儿逗留什么?
Let me show you round.让我领你到处转转。
He invited us round for drinks.他请我们到家里喝几杯。
I haven't got enough candies to go round.我没有足够的糖果可让每人都分到。
Turn the picture round to face the wall.把画转过去面对墙。
It was the face of a man round fifty.那是一个50岁光景的男人。

They swarmed close round her to hear.他们挤在她的周围听着。
The children were sitting round the table.孩子们正环桌而坐。
He lives in a village round the town.他住在这个小镇附近的一个村庄里。
The blood circulates round the body.血液在全身循环。
The shops are always crowded with people all round the year.商店一年到头总是挤满了人。
It was a mile by water, four miles round the shore.由水路去只有一英里,沿岸绕行要4英里。
The reformer soon gathered a band of followers round him.改革者很快就获得一群追随者支持他。
There are several solutions round this.关于这一点有几个解决办法。

round, about, around
参见around条。