a. A great or plentiful amount: an abundance of rain.
b. The condition of being in rich supply: bananas growing in abundance.
a. Degree of plentifulness: "Species of low abundance are ignored in the calculation of predominance" (William M. Lewis).
b. Chemistry The amount of an isotope of an element that exists in nature, usually expressed as a percentage of the total amount of all isotopes of the element.
3. Affluence; prosperity: living in abundance.
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.