1. The property of a more than adequate quantity or supply
   "an age of abundance";
   - copiousness, teemingness
    
2. (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present
   "The natural abundance of carbon-13 is about 1.1% of all carbon atoms"
    
3. (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million
   "The abundance of oxygen in Earth's crust is about 46%"

Derived forms: abundances

Type of: quantity, ratio

Antonym: scarceness

Encyclopedia: Abundance