A measure for something; a means of deriving a quantitative measurement or approximation for otherwise qualitative phenomena (especially used in engineering).

(mathematics) A function for the measurement of the "distance" between two points in some metric space: it is a real-valued function d(x,y) between points x and y satisfying the following properties: (1) "non-negativity": d ( x , y ) ≥ 0 {\displaystyle d(x,y)\geq 0} , (2) "identity of indiscernibles": d ( x , y ) = 0  iff  x = y {\displaystyle d(x,y)=0{\mbox{ iff }}x=y} , (3) "symmetry": d ( x , y ) = d ( y , x ) {\displaystyle d(x,y)=d(y,x)} , and (4) "triangle inequality": d ( x , y ) ≤ d ( x , z ) + d ( z , y ) {\displaystyle d(x,y)\leq d(x,z)+d(z,y)} .

(mathematics) A metric tensor.

Abbreviation of metric system.

(transitive, aerospace, systems engineering) To measure or analyse statistical data concerning the quality or effectiveness of a process.

Of or relating to the metric system of measurement.

(music) Of or relating to the meter of a piece of music.

(mathematics, physics) Of or relating to distance.