/ Dictionary / Index R rating nut: Meaning and Definition of Find definitions for: rat'ing nut" Pronunciation: [key] — Horol. Horol. a nut that screws onto the lower end of the rod of a clock pendulum for raising or lowering the weight to alter the rate of the clock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rating badge ratio Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language