Definition of "circulation"

circulation

/ˌsɜː(ɹ).kjʊˈleɪ.ʃən/

noun
countable and uncountable, plural circulations
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.
  Quotations
  For example, by changing the use of existing rooms, removing or replacing unsightly features, clearing obstacles to easy circulation, rearranging direction signs and generally introducing as much order as possible, most outdated station buildings can be made reasonably efficient and attractive.
  1962 October, Brian Haresnape, “Focus on B.R. passenger stations”, in Modern Railways, page 252
3. Currency; circulating coins; notes, bills, etc., current for coin.
4. The extent to which anything circulates or is circulated; the measurement of diffusion
  Quotations
  The reputation and circulation of the paper continued to grow, and the board decided a new custom-built base was required for both the Press and Journal and Evening Express to replace the crumbling, but much loved, Broad Street offices.
  June 1 2016, Karen Roberts in the Evening Express, Aberdeen Journals - The Broad Street Years
5. (strictly) 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; (loosely) the circulatory system.
  Quotations
  In the dead state all is apparently without motion. No agent within indicates design, intelligence, or foresight: there is no respiration; no digestion, circulation, or nutrition; […]
  1822, John Barclay, chapter I, in An Inquiry Into the Opinions, Ancient and Modern, Concerning Life and Organization‎, Edinburgh, London: Bell & Bradfute; Waugh & Innes; G. & W. B. Whittaker, section I, page 2
6. The movement of the sap in the vessels and tissues of plants.

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