General Science


  • noun the fact that something is very accurate


  • A measure of the repeatability of a given result or procedure, such as a measurement. For example, a measurement made several times in which the same, or nearly the same value is obtained, indicates precise measurement. This does not necessarily mean that such measurements specify or approximate a real value, thus a precise measurement may not be accurate. still, even in technical usage the term is often used synonymously with accuracy.
  • The number of significant digits provided in a measurement or other value. The more significant digits, the more precise.
  • Pertaining to components, devices, equipment, and systems which are characterized by exactness, such as those which adhere closely to a given standard.

Health Economics

  • (written as Precision)
    Precision is a measure of how close an estimate is to the true value of a parameter. Less precision is usually indicated by a larger standard error.

Information & Library Science

  • noun the number of relevant records returned by a search, expressed as a percentage of the total number of records returned