/ Dictionary / Index P phrase-structure rule: Meaning and Definition of Find definitions for: phrase'-structure rule" Pronunciation: [key] — Ling. Ling. a rule that generates a sentence or other syntactic construction from words and phrases and identifies its constituent structure. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phrase-structure grammar phrase structure tree Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language