circulation
Plural
circulations
1
the flow and movement of blood around and in all parts of the body
Circulation refers to the continuous movement of blood throughout the cardiovascular system. It is driven by the rhythmic contractions of the heart and facilitated by a network of blood vessels, including arteries, veins, and capillaries. Circulation ensures the delivery of oxygen, nutrients, hormones, and other vital substances to all tissues and organs while removing waste products and carbon dioxide. It plays a vital role in maintaining cellular function, supporting organ systems, regulating body temperature, and facilitating the immune response. Proper circulation is essential for overall health and well-being.
- Regular exercise improves blood circulation throughout the body.
- She felt lightheaded due to poor circulation in her legs.
- Cold weather can slow down circulation and make extremities feel numb.
- Good circulation is essential for maintaining overall cardiovascular health.
- The doctor checked his circulation to ensure there were no issues with blood flow.
2
the total number of copies of a newspaper or magazine distributed, including both sales and delivery to readers
Circulation refers to the number of copies of a newspaper, magazine, or other periodical that are distributed to readers, either through subscriptions or sales. It is a key measure of the reach and popularity of a publication. A higher circulation indicates that more people are reading the publication, which can make it more attractive to advertisers. Circulation can be broken down into different types, such as paid circulation, where readers pay for a subscription or single copy, and controlled circulation, where copies are distributed for free to a targeted audience.
- The magazine has a circulation of 200,000.
- Newspaper circulation has dropped in recent years.
- That journal has the widest circulation among scientists.
- A reliable circulation network ensures timely delivery.
- A higher circulation attracts more advertisers.
3
the process by which something such as money, information, or rumors spreads among people or within a system
- The circulation of counterfeit bills worried the bank.
- Fast circulation of news is common online.
- Rumor circulation damaged his reputation.
- Digital media increased the circulation of information.
- The circulation of petitions grew quickly on social networks.
4
the movement of a substance within an organism or system, such as sap in plants or cytoplasm in a cell
- The circulation of sap keeps the tree nourished.
- Cell biologists studied the circulation of cytoplasm.
- Warm water helps the circulation of nutrients in plants.
- The experiment showed poor circulation inside the tissue.
- Oxygen enters through the circulation in aquatic plants.
5
(in libraries) the measure of how many books are borrowed over a certain period
- The library reported a rise in book circulation.
- Children's books have the highest circulation.
- Staff monitor monthly circulation trends.
- Textbooks showed steady circulation during exams.
- Summer programs increased overall circulation.