circulation Meaning, Definition & Usage
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       noun the dissemination of copies of periodicals (as newspapers or magazines)
        
      
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       noun movement through a circuit; especially the movement of blood through the heart and blood vessels
        
      
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       noun (library science) the count of books that are loaned by a library over a specified period
        
      
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       noun number of copies of a newspaper or magazine that are sold
        
      
- by increasing its circulation the newspaper hoped to increase its advertising
 
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       noun free movement or passage (as of cytoplasm within a cell or sap through a plant)
        
      
- ocean circulation is an important part of global climate
 - a fan aids air circulation
 
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       noun the spread or transmission of something (as news or money) to a wider group or area
        
      
 
WordNet
Cir`cu*la"tion noun
Etymology
L.Definitions
-  
The act of moving in a circle, or in a course which brings the moving body to the place where its motion began. This continual circulation of human things. Swift.
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The act of passing from place to place or person to person; free diffusion; transmission. The true doctrines of astronomy appear to have had some popular circulation. Whewell.
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Currency; circulating coin; notes, bills, etc., current for coin.  -  
The extent to which anything circulates or is circulated; the measure of diffusion; as, the .circulation of a newspaper -  
(Physiol.) The movement of the blood in the blood-vascular system, by which it is brought into close relations with almost every living elementary constituent. Also, the movement of the sap in the vessels and tissues of plants.