say it: SUR-kyuh-lay-shuhn
circulation is a noun meaning "the dissemination of copies of periodicals (as newspapers or magazines)". It carries 6 recorded senses.
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
library science
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”
plant
the spread or transmission of something (as news or money) to a wider group or area
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for circulation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.