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.
Definition of: digital circuit digital circuit An electronic circuit that accepts and processes binary data (on/off) according to the rules of Boolean logic (AND, OR, NOT, etc.). See chip and BeBop to the Boolean Boogie. Digital Plumbing! A digital circuit can be conceptualized as a mass of plumbing. The circuit paths are the pipes, the transistors are the valves and the electricity is the water. Imagine opening a valve, and the water that passes through it and down a pipe will eventually reach a second valve, causing it to turn on, allowing water in another pipe to flow through it that reaches another valve, and so on.