Circulation may refer to:
Science and technology
*
Atmospheric circulation, the large-scale movement of air
*
Circulation (physics), the path integral of the fluid velocity around a closed curve in a fluid flow field
*
Circulatory system
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. It includes the cardiovascular system, or vascular system, that consists of the heart ...
, a biological organ system whose primary function is to move substances to and from cells
*
Circulation problem, a generalization of network flow problems
*
Circulation (architecture), the flow of people through a building
*
Circulation (currency), all currency held by consumers and businesses, but not by financial institutions and governments
*
Exhaust gas recirculation, a nitrogen oxide reduction technique used in most gasoline and diesel engines
*
Library circulation, the activities around the lending of library books and other material to users of a lending library
*
Ocean circulation, the large-scale movement of water
*
Rhetorical circulation, the ways that texts and discourses move through time and space
Other uses
*
Print circulation, the average number of copies of a publication
*
Circulation Festival, an annual circus and fire performance festival held in Dunedin, New Zealand
*
''Circulation'' (film), a 2008 psychological thriller-fantasy film by Ryan Harper
*
''Circulation'' (journal), a journal published by the American Heart Association
{{disambig