Circulation - Definition
circulation
n 1: the dissemination of copies of periodicals (as newspapers
or magazines)
2: movement through a circuit; especially the movement of blood
through the heart and blood vessels
3: (library science) the count of books that are loaned by a
library over a specified period
4: number of copies of a newspaper or magazine that are sold;
"by increasing its circulation the newspaper hoped to
increase its advertising"
5: 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"
6: the spread or transmission of something (as news or money) to
a wider group or area