A junction is a place where two or more things meet or join together. Roads form a junction where they cross or intersect, creating a spot where drivers must choose which direction to continue. Railroad tracks meet at junctions, allowing trains to switch from one line to another. Rivers can form junctions too: where two streams flow together, they create a single, larger river.

In your body, nerve junctions are spots where nerve cells meet and pass signals to each other, letting you move and feel things. Electrical junctions are where wires connect in a circuit.

In British English, people often call an intersection a road junction or simply a junction, while Americans are more likely to say intersection. You might hear someone say, “Turn left at the next junction,” meaning the place where roads meet.

When something happens in conjunction with something else, the two things work together or happen at the same time. A school might hold a science fair in conjunction with a math competition, scheduling them together so families can attend both.