Intersection

Noun

1. The junction of two (or more) paths, streets, highways, or other thoroughfares.
2. Any overlap, confluence, or crossover.
3. The point or set of points common to two geometrical objects (such as the point where two lines meet or the line where two planes intersect).
4. The set containing all the elements that are common to two or more sets.
5. The element where two or more straight lines of synchronized skaters pass through each other.