/ Dictionary / Index A adjoin: Meaning and Definition of Find definitions for: ad•join Pronunciation: (u-join'), [key] — v.t. to be close to or in contact with; abut on: His property adjoins the lake. to attach or append; affix. —v.i. to be in connection or contact: the point where the estates adjoin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adjoin (Thesaurus) adjective phrase adjoining Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language