What does the term metric mean?

Answer 1

A metric is whatever you use to numerically evaluate a variable - for sales the metric could be number of units sold, for politicians it could be poll results and for the Olympics it could be gold medals won. In many cases, however, the term "metric" is the common term used for the International System of Units (abbreviated SI from French: Le Système international d'unités) of weights and measures based on the gram, meter and second.