Simple Definition of open sesame
: something that allows a person or thing to do or enter something successfully and easily
Full Definition of open sesame
: something that unfailingly brings about a desired end
Examples of open sesame
Perfect test scores are an open sesame to the best schools.
<it turned out that a simple “please” was the open sesame for charming the hotel manager into giving us a room with a better view>
Origin of open sesame
from open sesame, the magical command used by Ali Baba to open the door of the robbers' den in Ali Baba and the Forty Thieves
First Known Use: circa 1837
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Thesaurus: All synonyms and antonyms for "open sesame"
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