/ Dictionary / Index D designer gene: Meaning and Definition of Find definitions for: design'er gene' Pronunciation: [key] a gene altered or created by genetic engineering, esp. for use in gene therapy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. designer drug designing Related Content Daily Word Quiz: precarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language