/ Dictionary / Index G gene therapy: Meaning and Definition of Find definitions for: gene' ther"apy Pronunciation: [key] — Med. Med. the application of genetic engineering to the transplantation of genes into human cells in order to cure a disease caused by a genetic defect, as a missing enzyme. Cf. gene transfer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. genet genethliac Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language