Definitions
1.nounThe act of moving in a circle, or in a course which brings the moving body to the place where its motion began.
2.nounThe act of passing from place to place or person to person; free diffusion; transmission.
3.nounCurrency; circulating coins; notes, bills, etc., current for coin."The new bills will come into circulation next Friday."
4.nounThe extent to which anything circulates or is circulated; the measurement of diffusion
5.nounThe movement of the blood in the circulatory system, by which it is brought into close relations with almost every living elementary constituent.
6.nounThe movement of the sap in the vessels and tissues of plants.