/ Dictionary / Index A ad rem: Meaning and Definition of Find definitions for: ad rem Pronunciation: (ad rem' Lat. äd rem'), [key] relevant; pertinent: an ad rem remark. without digressing; in a straightforward manner: to reply ad rem. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Adrastus adren- Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language