to move around or pass from person to person

(meteorology) The circulation of air in a Hadley cell.

Any of the global circulatory currents, such as the Gulf Stream, that are driven by differences in temperature and salinity.

a form of cylindrical motion found in the near-surface waters of lakes and oceans under windy conditions, characterized by lines or streaks of seaweed etc (called windrows) roughly parallel to the wind

(anatomy) The circulation of blood through a network of vessels that is developed through enlargement of secondary vessels and use of existing anastomoses between adjacent vessels when a major vein or artery is functionally impaired, as by obstruction.

plural of collateral circulation

plural of pulmonary circulation

plural of systemic circulation

plural of thermohaline circulation

(anatomy) The part of blood circulation which carries oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart.