Definition of "Metric" :
noun: a system of related measures that facilitates the quantification of some particular characteristic
noun: a decimal unit of measurement of the metric system (based on meters and kilograms and seconds)
"Convert all the measurements to metric units."
noun: a function of a topological space that gives, for any two points in the space, a value equal to the distance between them
adjective: the rhythmic arrangement of syllables
adjective: based on the meter as a standard of measurement
"The metric system."