intersection
part of speech
noun (an intersection, intersections)
meaning for a pupil
1) A place where two or more roads meet or cross; a crossroads or junction. tree →
2) (maths) The point or line where two lines or shapes cross. tree →
3) (maths) In sets and Venn diagrams, the part where two sets overlap: the things that belong to both. tree →
sense in the lessons
In road safety, intersections are where you must stop, look and cross carefully. In maths, the intersection of two lines is a point; in a Venn diagram, it is the middle where circles overlap. Phrases: «at the intersection», «the point of intersection», «busy intersection».
examples
- Wait for the green man at the busy intersection. tree →
- Turn left at the next intersection. tree →
- The two lines meet at the point of intersection. tree →
- In the Venn diagram, children who like cats and dogs go in the intersection. tree →
- The intersection of the sets {1, 2, 3} and {2, 3, 4} is {2, 3}. tree →
- There is a traffic light at every intersection on our street. tree →
- Two straight lines that cross have exactly one intersection. tree →
note
Countable; plural «intersections». Verb «intersect». In the UK people often say «junction» or «crossroads» for a road intersection. In maths sets, the intersection is the overlap («and»), not putting everything together (that is the «union»).
Trees and pragmatics
Every meaning and example of «intersection» parsed by Mova, each sentence with its dependency tree and frames.