The Oxford Thesaurus An A-Z Dictionary of Synonyms - circulationn.

1) circuit, course, orbit, flow, flowing, motion: It was Harvey who discovered the circulation of the blood. 2) spread, spreading, dissemination, transmission, passage, distribution, diffusion, publication, advertisement, announcement, issuance, issuing, pronouncement, proclamation, promulgation, broadcast, broadcasting: The state has again forbidden the free circulation of information.