/ Dictionary / Index A -ades: Meaning and Definition of Find definitions for: -ades Pronunciation: [key] a suffix occurring in loanwords from Greek, the plural of: Hyades; Pleiades. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: -ades (Thesaurus) adequate adessive Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language