ns]
| 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, Chemistry. the number of atoms of one isotope of an element divided by the total number of atoms in a mixture of the isotopes. |