/ Dictionary / Index R rock-ribbed: Meaning and Definition of Find definitions for: rock-ribbed Pronunciation: (rok'ribd"), [key] — adj. having ribs or ridges of rock: the rock-ribbed coast of Maine. unyielding; confirmed and uncompromising: a rock-ribbed conservative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rock-ribbed (Thesaurus) rock rabbit rockrose Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language