open ses·a·me \ˌ ̷ ̷ ̷ ̷ˈsesəmē, -mi\noun Usage: sometimes capitalized O Etymology: from open sesame, the magical command used to open the door of the robbers' den by Ali Baba in the Arabian Nights tale of Ali Baba and the Forty Thieves : something that unfailingly brings about a desired end < believe that education is for them … an open sesame to a good life — E.O.Melby >