noun. ['əˈbʌndəns'] the property of a more than adequate quantity or supply.
noun. ['əˈbʌndəns'] (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present.
noun. ['əˈbʌndəns'] (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.