| n. | 1. | The act of moving in a circle, or in a course which brings the moving body to the place where its motion began. |
| 2. | The act of passing from place to place or person to person; free diffusion; transmission. | |
| 3. | Currency; circulating coin; notes, bills, etc., current for coin. | |
| 4. | The extent to which anything circulates or is circulated; the measure of diffusion; | |
| 5. | (Physiol.) The movement of the blood in the blood-vascular system, by which it is brought into close relations with almost every living elementary constituent. Also, the movement of the sap in the vessels and tissues of plants. |
| Noun | 1. | circulation - the dissemination of copies of periodicals (as newspapers or magazines) |
| 2. | circulation - movement through a circuit; especially the movement of blood through the heart and blood vessels | |
| 3. | circulation - (library science) the count of books that are loaned by a library over a specified period | |
| 4. | circulation - number of copies of a newspaper or magazine that are sold; "by increasing its circulation the newspaper hoped to increase its advertising" | |
| 5. | circulation - free movement or passage through a series of vessels (as of water through pipes or sap through a plant) | |
| 6. | circulation - the spread or transmission of something (as news or money) to a wider group or area |
the flow of blood through the body's blood vessels and heart.
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