/ Dictionary / Index C chest register: Meaning and Definition of Find definitions for: chest' reg"ister Pronunciation: [key] — Music. Music. the low register of the human voice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chest protector chest-thumping Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language