circulation

Noun

• the spread or transmission of something (as news or money) to a wider group or area

• 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
    

• number of copies of a newspaper or magazine that are sold
  • by increasing its circulation the newspaper hoped to increase its advertising
    

• (library science) the count of books that are loaned by a library over a specified period

• movement through a circuit; especially the movement of blood through the heart and blood vessels

• the dissemination of copies of periodicals (as newspapers or magazines)