/ Dictionary / Index D deep structure: Meaning and Definition of Find definitions for: deep' struc'ture Pronunciation: [key] — Ling. Ling. (in transformational-generative grammar) the underlying semantic or syntactic representation of a sentence, from which the surface structure may be derived. Cf. surface structure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deep space deep-voiced Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language