/ Dictionary / Index R roily: Meaning and Definition of Find definitions for: roil•y Pronunciation: (roi'lē), [key] — roil•i•er, roil•i•est. turbid; muddy. turbulent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: roily (Thesaurus) roil roister Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language