Broadly, normalization (also spelled normalisation) is any process that makes something more normal, which typically means conforming to some regularity or rule, or returning from some state of abnormality. It has specific meanings in various fields:

• Normalization (sociology) , used in sociology.
• Normalization (Czechoslovakia), the restoration of the conditions prevalent before the reform in Czechoslovakia, 1969
• Normalizing constant, used in mathematics, perhaps most often in probability theory
• Database normalization, used in database theory. (See also denormalization).
• Text normalization
• Audio Normalization
• Knowledge normalization