1. the movement of blood through the body by the heart and blood vessels
Usage: medical
2. the movement of air, water, or other fluids in a current or cycle
3. the number of copies of a newspaper, magazine, or book sold or distributed
Usage: publishing

Examples

• Poor circulation in his legs made walking difficult.
• The fan improved air circulation in the stuffy room.
• The newspaper’s circulation dropped significantly last year.
• The magazine has a circulation of over one million readers.
• Security restricted circulation in the building after hours.
• Ocean currents help maintain global water circulation.
• Exercise helps improve blood circulation throughout the body.