Definitions for circulation

(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)