circulation /ˌsɚkjəˈleɪʃən/ noun plural circulations
plural circulations
Learner's definition of CIRCULATION
1 [noncount]
a : the movement of blood through the body that is caused by the pumping action of the heart血液循环 b : movement of air, water, etc., through the different parts of something（空气、水等的）流动，流通 -
The attic has poor air circulation.阁楼的空气流通不好。
-
the circulation of ocean waters海水的流动
-
Let's open the windows to get some circulation in here.我们打开窗户透透气吧。
2
[noncount] : the act of passing something (such as money, information, etc.) from person to person or place to place（钱币等的）流通；（消息等的）传播，流传 : the state of being passed from person to person or place to place流通（的状态） -
The coins have recently entered circulation.这些硬币最近开始流通。
-
That rumor has been in circulation [=has been going around] for a long time.那个谣言已经传了很久了。
-
The magazine has been taken out of circulation. [=the magazine will no longer be made and sold]这本杂志现已停止发行。
3
[noncount] : the state of being actively involved in social activities (such as parties or dates)参加社交活动；交际 -
She's finally getting back in/into circulation after her divorce. [=she has started dating and going out again after her divorce]离婚后她终于又重新参加社交活动了。
-
He'll be out of circulation [=unable to go out socially] for a while after the surgery.手术后他短期内将不能参加社交活动。
4
[count] : the average number of copies of a newspaper, magazine, etc., that are sold over a particular period（报刊等的）发行量，销售量 -
The newspaper has the largest circulation in the country.这份报纸的发行量居全国第一。
-
The magazine has a weekly circulation of about 70,000 subscribers nationwide.这份杂志每周在全国发行，订阅量约为7万份。