noun The act of moving in a circle, or in a course which brings the moving body to the place where its motion began.
noun The act of passing from place to place or person to person; free diffusion; transmission.
noun Currency; circulating coins; notes, bills, etc., current for coin.
The new bills will come into circulation next Friday.
noun The extent to which anything circulates or is circulated; the measurement of diffusion, especially the number of copies sold of a publication.
noun 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.
noun The movement of the sap in the vessels and tissues of plants.