Meaning of descriptive grammar

descrip'tive gram'mar

Pronunciation: [key]
  1. an approach to grammar that is concerned with reporting the usage of native speakers without reference to proposed norms of correctness or advocacy of rules based on such norms.
  2. a set of grammatical descriptions based on such an approach.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.