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."