Tightening a Loose Seat. Some toilet seat bolts are exposed, but most just have a plastic flap that snaps closed to cover them. Lift the cover that sits over the toilet seat bolts so you can see what type of bolt fastens the seat to the toilet bowl. This can be easily done with a flat screwdriver.
3. countable noun. A circuit is a series of places that are visited regularly by a person or group, especially as a part of their job. He joined the professional circuit. It's a common problem, the one I'm asked about most when I'm on the lecture circuit. Synonyms: course, round, tour, track More Synonyms of circuit.
closed circuit-a complete electrical circuit around which current flows or a signal circulates. loop. circuit, electric circuit, electrical circuit-an electrical device that provides a path for electrical current to flow. parallel circuit, shunt circuit-a closed circuit in which the current divides into two or more paths before recombining to complete the circuit. open circuit-an incomplete electrical circuit in which no current flows. 1  Facebook.