The hero of a story supposed to be from the Arabian Nights, who discovered the magic formula (‘Open Sesame!’) which opened a cave where forty thieves kept their treasure.
Definition of Ali Baba in US English:
Ali Baba
proper nounˌälē ˈbäbə
The hero of a story supposed to be from the Arabian Nights, who discovered the magic formula (“Open Sesame!”) that opened a cave where forty robbers kept their treasure.