1. a description (at a given point in time) of a language with respect to its phonology and morphology and syntax and semantics without value judgments;
WordNet (r) 3.0 (2006):
descriptive linguistics
n 1: a description (at a given point in time) of a language with
respect to its phonology and morphology and syntax and
semantics without value judgments [ant: prescriptive
linguistics]