What does "circulation" mean?

Circulation: The act of passing from place to place or person to person; free diffusion; transmission. The true doctrines of astronomy appear to have had some popular circulation. Whewell.

Additional senses

  1. 2.Currency; circulating coin; notes, bills, etc., current for coin.
  2. 3.The extent to which anything circulates or is circulated; the measure of diffusion; as, the circulation of a newspaper.
  3. 4.(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.

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