/ Dictionary / Index I impermanent: Meaning and Definition of Find definitions for: im•per•ma•nent Pronunciation: (im-pûr'mu-nunt), [key] — adj. not permanent or enduring; transitory. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: impermanent (Thesaurus) imperium impermeable Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language