/ Dictionary / Index A Achates: Meaning and Definition of Find definitions for: A•cha•tes Pronunciation: (u-kā'tēz), [key] — n. (in the Aeneid) the faithful companion and friend of Aeneas. a faithful friend or companion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Achan Achaz Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language