/ Dictionary / Index A aut Caesar, aut nihil*: Meaning and Definition of Find definitions for: aut Cae•sar aut ni•hil Pronunciation: (out kī'sär out ni'hil Eng. ôt sē'z&schwar ôt nī'hil), [key] — Latin. Latin. either a Caesar or nothing; all or nothing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. autarky autecism Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language