Ali Baba /ˈælɪˌbɑbə/ noun3 •(slang, offensive) An Iraqi. •[before a noun] A large container, such as a jar or a basket, with a flat base and usually a rounded body that tapers to a narrower neck.Towering over all these are the huge Ali Baba baskets, square at the bottom, round at the top, and fitted with square covers that pull down like a Dutch smoker's cap. — 2009 •(slang) An extremely lucky person, especially one who acquires a large fortune by luck or by chance. formsAli Babas · ali babas