›ITa path for an electric current to flow through: The most advanced chip technology, which uses circuits 65 nanometers apart, loses almost half of its power to leakage. an electrical/electronic circuit → See alsointegrated circuit
›a series of events or places that are regularly visited by a particular group of people: a lecture/conference/speaking circuitFor the past two years he has been on the international lecture circuit, often speaking on business ethics.