Circulation

1. n. 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.
2. n. The act of moving in a circle, or in a course which brings the moving body to the place where its motion began.
3. n. The act of passing from place to place or person to person; free diffusion; transmission.
4. n. Currency; circulating coin; notes, bills, etc., current for coin.
5. n. The extent to which anything circulates or is circulated; the measure of diffusion; as, the circulation of a newspaper.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.