/ Dictionary / Index S semper idem*: Meaning and Definition of Find definitions for: sem•per i•dem Pronunciation: (sem'per ē'dem Eng. sem'p&schwar ī'dem, id'em), [key] — Latin. Latin. always the same. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. semper fidelis* semper paratus* Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language