1. complete paths that electric current can flow through
2. roughly circular routes or courses
3. regular series of events, performances, or competitions held at different locations

Examples

• The electrician checked all the circuits in the house.
• A short circuit caused the power outage.
• The race car completed ten circuits around the track.
• She runs three circuits through the park every morning.
• The comedy club is part of the national entertainment circuit.
• The judge travels to different courts on his circuit.
• The tennis circuit includes tournaments worldwide.