open sesame[ses′ə mē′]
- magic words spoken to open the door of the thieves' den in the story of Ali Baba in The Arabian Nights
- any unfailing means of gaining admission or achieving some other end
Used by arrangement with John Wiley & Sons, Inc.
Origin: From the magical formula Open Sesame used by Ali Baba in the Arabian Nights to open the door of the robbers' cave.