/ Dictionary / Index A Ali Baba: Meaning and Definition of Find definitions for: A•li Ba•ba Pronunciation: (ä'lē bä'bä, al'ē bab'u), [key] the poor woodcutter, hero of a tale in The Arabian Nights' Entertainments, who uses the magic words “Open sesame” to open the door to the cave in which the Forty Thieves had hidden their treasure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aliasing alibi Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language