/ Dictionary / Index T Tenth Amendment: Meaning and Definition of Find definitions for: Tenth' Amend'ment Pronunciation: [key] an amendment to the U.S. Constitution, ratified in 1791 as part of the Bill of Rights, guaranteeing to the states and the people those rights that are not delegated to the federal government by the Constitution. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tenth Tenth Commandment Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language