/ Dictionary / Index I in aeternum*: Meaning and Definition of Find definitions for: in ae•ter•num Pronunciation: (in ī-ter'noom Eng. in ē-tûr'n&schwam), [key] — Latin. Latin. forever. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -inae inalienable Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language