- Linguistics. 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.
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- generative grammar a rule that converts one phrase marker into another. Taken together, these rules, which form the transformational component of the grammar, convert the deep structures of sentences into their surface structures
- (plural) logic a rule that specifies in purely syntactic terms a method by which theorems may be derived from the axioms of a formal system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012