/ Dictionary / Index A ab initio*: Meaning and Definition of Find definitions for: ab in•i•ti•o Pronunciation: (äb i-nit'ē-ō" Eng. ab i-nish'ē-ō"), [key] — Latin. Latin. from the beginning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Abington Abinoam Related Content Daily Word Quiz: slough Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language