/ Dictionary / Index T three R's: Meaning and Definition of Find definitions for: three R's Pronunciation: [key] reading, 'riting, and 'rithmetic, regarded as the fundamentals of education. the fundamentals, basic knowledge, or skills of any system or field: the three R's of good government. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Three Rivers threes and eights Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language