What is the meaning of Circulation?

The act of moving in a circle, or in a course which brings the moving body to the place where its motion began.

The act of passing from place to place or person to person; free diffusion; transmission.

Currency; circulating coins; notes, bills, etc., current for coin.

The extent to which anything circulates or is circulated; the measurement of diffusion

The movement of the blood in the circulatory system, by which it is brought into close relations with the cells and tissues of the body; the circulatory system.

The movement of the sap in the vessels and tissues of plants.

circulation (act of moving in a circular shape)

circulation (of blood)

traffic

distribution, circulation (of a newspaper/magazine)

Source: wiktionary.org