From Longman Dictionary of Contemporary Englishthe world is your oysterthe world is your oysterWANTused to tell someone that they can achieve whatever they want → oyster
Examples from the Corpus
the world is your oyster• The world is her oyster but she dreams of being a librarian.• After that, the world is your oyster, as they say.the world is your oysterthe world is your oysterLIMITthere is no limit to the opportunities that someone has If you’ve got a good education, the world is your oyster. → worldExamples from the Corpus
the world is your oyster• The world is her oyster but she dreams of being a librarian.• After that, the world is your oyster, as they say. 