Meaning of “circulation” - Learner’s Dictionary

circulation

noun uk us /ˌsɜːkjəˈleɪʃən/
BLOOD [ U ]

the movement of blood around your body:

Exercise improves your circulation.
INFORMATION [ U ]

the movement of information, money, or goods between people:

There are a lot of fake banknotes in circulation.
NEWSPAPERS [ no plural ]

the number of copies of a newspaper or magazine that are sold each day, week, etc

(Definition of “circulation” from the Cambridge Learner’s Dictionary © Cambridge University Press)