/ Dictionary / Index P presbycusia: Meaning and Definition of Find definitions for: pres•by•cu•sia Pronunciation: (prez"bi-ky'zhu, -zhē-u, -zē-u, pres"-), [key] — n. Med. impaired hearing due to old age. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Presb. presbyopia Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language