Pronunciation: (u-bun'duns), [key]
1. an extremely plentiful or oversufficient quantity or supply: an abundance of grain.
2. overflowing fullness: abundance of the heart.
3. affluence; wealth: the enjoyment of abundance.
4. Physics, Chem.the number of atoms of one isotope of an element divided by the total number of atoms in a mixture of the isotopes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.