precision
n.
The extent to which something is measured.
The ratio of relevant items to all items retrieved.
Notes
Precision1 is often expressed in terms of deviation from an established benchmark. - Precision2 measures the quality of a search. It is possible to retrieve all relevant items in a database (a 100% recall ratio), but the precision of the search is likely to be low. If a database contains 100 items, and 25 are relevant to a search, a search that returns all items has 100% recall but only 25% precision.
