Definition of oyster noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɔɪstə(r)//
; NAmE NAmE//ˈɔɪstər//
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  • a large flat shellfish. Some types of oyster can be eaten and others produce shiny white jewels called pearls. Oyster beds, on the mudflats, are a form of fish farming. See related entries: Invertebrates
  • Word OriginMiddle English: from Old French oistre, via Latin from Greek ostreon; related to osteon ‘bone’ and ostrakon ‘shell or tile’.Idioms
    the world is your oyster
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    there is no limit to the opportunities open to you With talent like that, the world is her oyster.
    See the Oxford Advanced American Dictionary entry: oyster