1) Limitation 2) Restriction 
Organizing the range of possibilities of any element or scale into distinct, easier to reference parts for the purpose of analysis.
[logic] The following musicians were either born in or residents of the city of Asheville, North Carolina. ...[science] In mathematics and empirical science, quantification is the act of counting and measuring that maps human sense observations and experiences into members of some set of numbers. Quantification in this sense is fundamental to the scientific method. ==Natural science== Some measure of the undisputed general importance of quantificat...
• (n.) Modification by a reference to quantity; the introduction of the element of quantity.
in logic, the attachment of signs of quantity to the predicate or subject of a proposition. The universal quantifier, symbolized by (-) or (-), ... [6 related articles]
In logic, specification of quantity or number. There are two main quantifiers: the universal quantifier (`For all x ...`) and the existential quantifier (`For at least one/some x ...`)....
Quan`ti·fi·ca'tion noun [ See Quantity .] Modification by a reference to quantity; the introduction of the element of quantity. « The quantification of the predicate belongs in part to Sir William Hamilton; viz., in its extension to negative propositions.» De Quincey....
[n] - a limitation imposed on the variables of a proposition (as by the quantifiers `some` or `all` or `no`) 2. [n] - the act of discovering or expressing the quantity of something
noun the act of discovering or expressing the quantity of something