cross·ing (krôsĭng, krŏsĭng)
1. The act or action of crossing.
a. A place at which roads, lines, or tracks intersect; an intersection.
b. A place at which a river, railroad, or highway, for example, may be crossed: a railroad crossing; a pedestrian crossing.
3. The intersection of the nave and transept in a cruciform church.
4. Biology The process of crossbreeding; hybridization.
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.