/ Dictionary / Index R rotary tiller: Meaning and Definition of Find definitions for: ro'tary till'er Pronunciation: [key] rototiller. rotary plow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rotary-till rotary valve Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language