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

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

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

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

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'

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