An analysis of how closely related two addresses are when they have both held a particular bitcoin. A way of linking addresses by tracking how bitcoins move between addresses. A taint analysis can show where stolen bitcoins go and could be used to determine how many steps it took for bitcoins to move from an address known for stolen coins to the current address.
Malone, J.A (2015). Glossary of Bitcoin Terms and Definitions. United States: Lulu Press, Inc