Breadcrumb Home > Dictionary > Index R Cite roller bearing: Meaning and Definition of Find definitions for: roll'er bear"ing Pronunciation: [key] — Mach. Mach. a bearing consisting of cylindrical or tapered rollers running between races in two concentric rings, one of which is mounted on a rotating or oscillating part, as a shaft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. roller Rollerblade TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News Noble Titles and Ranks in a Monarchy Chinese New Year History, Meaning, and Celebrations The Manchu Keeping Your Brain Active in a COVID-19 World Inaugural Trivia Related Content Daily Word Quiz: evanescent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language