/ Dictionary / Index N Ninth Amendment: Meaning and Definition of Find definitions for: Ninth' Amend'ment Pronunciation: [key] an amendment to the U.S. Constitution, ratified in 1791 as part of the Bill of Rights, guaranteeing that the rights enumerated in the Constitution would not be construed as denying or jeopardizing other rights of the people. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ninth ninth chord Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language