Data Mining is a technique used to analyze existing information, usually with the intention of pursuing new avenues to pursue business.
The analysis of large volumes of data maintained in databases or data warehouses using query tools, algorithms, and models to identify patterns, trends, and relationships or correlations among the data and to develop useful information for investigative and management purposes.
A program involving pattern-based queries, searches or other analyses of I or more electronic databases, where -- (a) a department or agency of the Federal Government. or a non-Federal entity acting on behalf of the Federal Government, is conducting the queries, searches, or other analyses to discover or locate a predictive pattern or anomaly indicative of terrorist or criminal activity on the part of any individual or individuals; (b) the queries, searches, or other analyses are not subject-based and do not use personal identifiers of a specific individual. or inputs associated with a specific individual or group of individuals, to retrieve information from the database or databases; and (c) the purpose of the queries, searches, or other analyses is not solely- (i) the detection of fraud, waste, or abuse in a Government agency or program; or (ii) the security of a Government computer system.
Data Mining has been defined 9 different ways in documents like SANS Glossary of Terms, Glossary of Definitions Used in the Medicaid Integrity Program, Glossary of Common Cybersecurity Terminology, and 6 more.