to or among many different places or in no particular direction同义词：about
in a circle or circular motion
(of quantities) imprecise but fairly close to correct同义词：approximately, about, close to, just about, some, roughly, more or less, or so
in or to a reversed position or direction同义词：about
to a particular destination either specified or understood
all around or on all sides同义词：about
in circumference
from beginning to end; throughout同义词：round
例句
I'll send someone to show you around.我派人带你到周围转转。
It'll be finished around Christmas.这事将在圣诞节前後完成。
He turned around as he heard a noise behind him.他听到身后有响声，便转过身来。
I will visit you around Christmas.我将在圣诞节前后去拜访你。
He looked around but could see nobody.他四处望了一下，看不到什么人。
My sister is around your age.我妹妹和你年龄相仿。
详细解释
a.round adv.（副词） On all sides:到处：例句：dirty clothes lying around.脏衣服丢得到处都是 In close to all sides from all directions:四周：自周围向四周：例句：a field bordered around with tall trees.四周都是高树环绕的田地 In a circle or with a circular motion:旋转：成圆圈的或以圆运动的：例句：spun around twice.转上两圈 In circumference or perimeter:周长：以周围的或周边的：例句：a pond two miles around.一个方圆两英里的池塘 In succession or rotation.轮流：连续的或循环的In or toward the opposite direction or position:在或向相反方向或位置的：例句：wheeled around.旋转 To or among various places; here and there:各地：向或在不同地方；到处：例句：wander around.到处闲逛 To a specific place:去某一地方：例句：Come around again sometime.有空时再来 In or near one`s current location:附近地：在或接近自己目前的地点：例句：waited around for the next flight.在这附近等下一个航班 From the beginning to the end:自始至终：例句：frigid weather the year around.一年到头都是寒冷的天气 Approximately; about:大概；大约：例句：weighed around 30 pounds; around $.3 billion in debt.重约30磅；大约3亿美元的欠债 prep.（介词）On all sides of:在四周：例句：trees around the field.那块地周围的树 In such a position as to encircle or surround:环绕：以这样的位置来环绕或围绕：例句：a sash around the waist.环绕腰部彩带 Here and there within; throughout:到处：在…内的各处；遍及：例句：on the political stump around the country.在全国各地作政治演说 In the immediate vicinity of; near:紧挨着；邻近：例句：She lives around Norfolk.她住在诺福克附近 On or to the farther side of:在较远一侧的，朝较远一侧的：例句：the house around the corner.拐角那边的那幢房子 So as to pass, bypass, or avoid:绕过：通过，绕过或越过：例句：a way around an obstacle; got around the difficulty somehow.绕过障碍的路；设法避开困难 Approximately at:大约在：例句：woke up around seven.大约在七点醒来 In such a way as to have a basis or center in:以为…中心：以某种方式使之（成为）…的基础或中心：例句：an economy focused around farming and light industry.以农业和轻工业为主的经济 adj.（形容词）Being in existence:活的：处于存在中：例句：Our old dog is no longer around.我们原来的狗已经死了 Being in evidence; present:在场的：可看到的；存在于…的：例句：asked if the store manager was around.问一问商店经理是否在场 <习惯用语>been around【非正式用语】 Having had many and varied experiences:经验丰富，老于世故：具有丰富经验和不同经历：例句：a young executive who has been around.一个经验丰富的年轻经理 习惯用语>来源：Middle English 中古英语 probably a- [in] * see a- 2可能为 a- [在…里] *参见 a-2round [circle] * see roundround [周围] *参见 round