Meaning of transformational grammar

transforma'tional gram'mar

Pronunciation: [key]
  1. a system of grammatical analysis, esp. a form of generative grammar, that posits the existence of deep structure and surface structure, using a set of transformational rules to derive surface structure forms from deep structure; a grammar that uses transformations to express the relations between equivalent structures.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.