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