Breadcrumb Home > Dictionary > Index R rock bolt: Meaning and Definition of Find definitions for: rock' bolt" Pronunciation: [key] — Mining, Civ. Engin. Mining,Civ. Engin. a steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rock blenny rock bottom TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: quisling Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language