Meaning of circulation

Definition of circulation

(noun) 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

Other information on circulation

WIKIPEDIA results for circulation
Amazon results for circulation