in·ter·sec·tion (ĭn′tər-sĕkshən, ĭntər-sĕk′-)
1. The act, process, or result of intersecting.
2. A place where things intersect, especially a place where two or more roads cross.
a. The point or locus of points where one line, surface, or solid crosses another.
b. A set that contains elements shared by two or more given sets.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.