cross·o·ver (krôsō′vər, krŏs-)
1. A place at which or the means by which a crossing is made.
2. A short connecting track by which a train can be transferred from one line to another.
3. Genetics Crossing over.
4. A registered member of one political party who votes in the primary of the other party.
a. The adaptation of a musical style, as by blending elements of two or more styles or categories, to appeal to a wider audience.
b. One, such as a performer, song, or movie, that appeals to more than one segment of an audience or market.
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.