enriched, 1. (in nutrition) pertaining to foods to which vitamins or minerals have been added within limits specified by the U.S. Food and Drug Administration, usually to replace nutrients lost during processing. For example, enriched grain products have four B vitamins (B1, B2, B3, and folic acid) and iron added. 2. (in chemistry) pertaining to a substance containing a proportion of isotope greater than that found in the naturally occurring form of the same element. 3. (in chemistry) pertaining to a compound containing a greater proportion of one of two possible forms.
