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Measure can mean:
- To perform a measurement.
- In mathematics, a measure is a way to assign non-negative real numbers to subsets of a given set, in order to "measure their sizes or probabilities". See measure (mathematics) for a treatment of the concept.
- In music, a measure is a unit of time in Western music usually equalling the metric unit length. It represents a regular grouping of beats, a meter, as indicated in musical notation by the time signature. Measures are also called bars, since measures are separated by vertical bars (called bar lines) in musical notation.
- In civics, a measure is a legislative bill, a ballot measure, or enactment.
- In war, a measure is some tactic used by a friend or a foe; an opposing tactic is called a countermeasure; an opposing tactic to a countermeasure can be called a counter countermeasure, etc.
- In politics, especially of a dictatorial nature, a measure is usually an euphemism for suppressing a particular perceived enemy.
- In functional programming, a measure is a method of proving that a function will terminate.
- In geology and mining, a coal measure is a stratum or seam of coal.