/ Dictionary / Index M magnetic permeability: Meaning and Definition of Find definitions for: magnet'ic permeabil'ity Pronunciation: [key] permeability (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. magnetic north magnetic pickup Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language