/ Dictionary / Index A attack dog: Meaning and Definition of Find definitions for: attack' dog" Pronunciation: [key] a dog trained to attack on command, as for protection or to aid in the apprehension of criminals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. attack attagirl Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language