/ Dictionary / Index J jnt.: Meaning and Definition of Find definitions for: jnt. Pronunciation: [key] joint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jno. jo Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language