/ Dictionary / Index A altern: Meaning and Definition of Find definitions for: al•tern Pronunciation: (ôl'turn, al'-), [key] — adj. Archaic. alternate; following one another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alter idem* alternant Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language