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oyster

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noun, often attributive oys·ter \ˈȯis-tər\

Simple Definition of oyster

  • : a type of shellfish that has a rough shell with two parts and that is eaten both cooked and raw

Source: Merriam-Webster's Learner's Dictionary

Full Definition of oyster

  1. 1 a :  any of various marine bivalve mollusks (family Ostreidae) that have a rough irregular shell closed by a single adductor muscle and include commercially important shellfish b :  any of various mollusks resembling or related to the oysters

  2. 2 :  something that is or can be readily made to serve one's personal ends <the world was her oyster>

  3. 3 :  a small mass of muscle contained in a concavity of the pelvic bone on each side of the back of a fowl

  4. 4 :  an extremely taciturn person

  5. 5 :  a grayish-white color

Origin and Etymology of oyster

Middle English oistre, from Anglo-French, from Latin ostrea, from Greek ostreon; akin to Greek ostrakon shell, osteon bone — more at osseous


First Known Use: 13th century

Rhymes with oyster



OYSTER Defined for Kids

oyster

play
noun oys·ter \ˈȯi-stər\

Definition of oyster for Students

  1. :  a shellfish that lives on stony bottoms (oyster beds) in shallow seawater, has a rough grayish shell made up of two hinged parts, and is often used for food





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