What does normalisation mean?
Normalisation is the process of bringing something to a standard or consistent form. It is commonly used in data preparation, mathematics, statistics, signal and image processing, and quality control. For example, researchers may apply normalisation to measurements from different sources so that values can be compared meaningfully rather than merely expressed on incompatible scales. In a general or organizational setting, the word can describe standardizing forms, procedures, or spelling. The term has a technical meaning in statistics: converting a variable so that its values are expressed relative to a mean and standard deviation, or according to another specified reference. Normalisation does not necessarily make something uniform in every respect; rather, it establishes a shared framework or standard. Its US spelling is normalization.
The process of making something standard, consistent, or similar to other comparable things; in mathematics and statistics, the conversion of values to a common scale or reference range.
"The normalisation of the audio files ensured that every track had the same loudness."
In technical writing, the precise transformation applied is often specified by context. British English generally uses normalisation, while American English generally uses normalization.
To make something standard, consistent, or comparable by applying a defined rule or transformation.
"The software normalises the readings before calculating the final score."
The verb is normalise in British English and normalize in American English.
The standard British plural is normalisations; the American plural is normalizations.
"Several normalisations of the temperature data produced slightly different results."
Normalisation lets unlike measurements speak the same statistical language: it puts values on a common scale without erasing their differences.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does normalisation come from?
The word derives from Latin normalis, meaning “conforming to a rule or standard,” from norma, meaning “rule” or “pattern.” The related English adjective normal entered use in the early 17th century, and the verb normalize developed from it during the 19th century. The British form normalisation and the American form normalization reflect the conventional difference in spelling.
Related word forms
How normalisation is actually used
The British spelling is normalisation and the American spelling is normalization. In mathematics and statistics, the term is technical; in general contexts, it usually means making practices, forms, or results consistent with a standard. The related verb is also commonly spelled normalise in British English and normalize in American English.
Easily confused with normalisation
Normalisation is the standard British spelling, while normalization is the standard American spelling of the same word.