/ Dictionary / Index P plain bearing: Meaning and Definition of Find definitions for: plain' bear"ing Pronunciation: [key] — Mach. Mach. any of various bearings, not containing rolling elements, that present to the shaft or axle they support broad areas of corresponding form, usually segments of a cylinder. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plain plainchant Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language