/ Dictionary / Index A ACE inhibitor: Meaning and Definition of Find definitions for: ACE' inhib"itor Pronunciation: (ās, ā'sē'ē'), [key] any of a group of vasodilator drugs used in the treatment of hypertension and heart failure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ace-high ace in the hole Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language