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)