circulation

Universal Words noun 1 the movement of blood around the body: Regular exercise will improve blood circulation. * to have good / bad circulation 2 [U] the passing or spreading of sth from one person or place to another: the circulation of money / information / ideas * A number of forged tickets are in circulation. * The coins were taken out of circulation. * Copies of the magazine were withdrawn from circulation. * putting computer viruses into circulation 3 [U] the fact that sb takes part in social activities at a particular time: Anne has been ill but now she's back in circulation. * I was out of circulation for months after the baby was born. 4 [C,usually sing.] the usual number of copies of a newspaper or magazine that are sold each day, week, etc: a daily circulation of more than one million 5 [U,C] the movement of sth (for example air, water, gas, etc.) around an area or inside a system or machine: Poor air circulation can cause condensation.