/ Dictionary / Index A Argus-eyed: Meaning and Definition of Find definitions for: Ar•gus-eyed Pronunciation: (är'gus-īd"), [key] — adj. having keen eyes; vigilant; watchful. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: argus-eyed (Thesaurus) Argus argus tortoise beetle Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language