Definition of "quantify"

quantify

/ˈkwɒn.tɪˌfaɪ/

verb
third-person singular simple present quantifies, present participle quantifying, simple past and past participle quantified
1. To assign a quantity to.
2. To determine the value of (a variable or expression).
  Quotations
  As in much of biology, the most satisfying truths in ecology derive from manipulative experimentation. Tinker with nature and quantify how it responds.
  2012 January, Robert M. Pringle, “How to Be Manipulative”, in American Scientist‎, volume 100, number 1, archived from the original on 3 October 2013, page 31
3. (logic) To relate a statement (called a predicate) to a given set using a quantifier—either for all (denoted ∀) or there exists (denoted ∃).