metric

Short definition from Wiktionary

Adjective

1. 1
   Of or relating to the metric system of measurement.
2. 2
   Of or relating to the meter of a piece of music.
3. 3
   Of or relating to distance.

Noun

1. 1
   A measure for something; a means of deriving a quantitative measurement or approximation for otherwise qualitative phenomena (especially used in engineering).
2. 2
   A function which satisfies a particular set of formal conditions, created to generalize the notion of the distance between two points. Formally, a real-valued function d on M×M, where M is a set, is called a metric if (1) d(x,y)=0 if and only if x=y, (2) d(x,y)=d(y,x) for all pairs (x,y), and (3) d obeys the triangle inequality.
3. 3
   A metric tensor.
4. 4
   Abbreviation of metric system.

Verb

1. 1
   To measure or analyse statistical data concerning the quality or effectiveness of a process.