/ Dictionary / Index R restful: Meaning and Definition of Find definitions for: rest•ful Pronunciation: (rest'ful), [key] — adj. giving or conducive to rest. being at rest; quiet; tranquil; peaceful. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: restful (Thesaurus) rest energy restharrow 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