Learn what reduction is in chemistry, how it differs from oxidation, and how it occurs in various reactions and processes. Find out the role of reducing agents, the modern concept of reduction , and the applications of reduction in metabolism, organic synthesis, metallurgy, and more. Synonyms for REDUCTION : deduction, discount, abatement, drop, decline, diminution, loss, depreciation; Antonyms of REDUCTION : addition, increase, gain, accession ... Reduction is a term that has many meanings and applications in science, technology, medicine, arts, philosophy, and more. It can refer to a process of simplifying, transforming, or reducing something, or a method or technique for achieving a goal or effect. Learn the meaning of reduction as a noun, with examples of how to use it in different contexts. Reduction can refer to the act of making something smaller or an amount by which something is reduced.