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.
A·li Ba·ba (ä'lē bä'bə, āl'ē) n. A poor woodcutter in the Arabian Nights who gains entrance to the treasure cave of the 40 thieves by saying the magic words "Open, Sesame!"