Ling. a rule of transformational grammar that relates two phrase markers in the course of a derivation from the deep to the surface syntactic representation of a sentence, as by reordering, inserting, or deleting elements; a rule that converts deep structures into surface structures.
TRANSFORMATIONAL RULE
Meaning of TRANSFORMATIONAL RULE in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012