/ Dictionary / Index P permeance: Meaning and Definition of Find definitions for: per•me•ance Pronunciation: (pûr'mē-uns), [key] — n. the act of permeating. the conducting power of a magnetic circuit for magnetic flux; the reciprocal of magnetic reluctance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. permeameter permeant Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language