intr.v. co·in·cid·ed, co·in·cid·ing, co·in·cides
1. To occupy the same relative position or the same area in space.
2. To happen at the same time or during the same period.
3. To correspond exactly; be identical. See Synonyms at correspond.
4. To agree exactly, as in opinion; concur.
[Medieval Latin coincidere : Latin co-, co- + Latin incidere, to occur; see INCIDENT.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.