| an enclosure that houses electric wires or cables that are joined together and protects the connections. |
| junction box n. An enclosure within which electric circuits are connected. |
junction box  (jŭngk'shən) Pronunciation Key
An enclosure within which electric circuits, such as the electrical wiring for different sections of a building, are connected to other circuits, such as outside power sources. Junction boxes are very common in telecommunications circuitry and are used to protect the connections and provide easy access to them. |