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plain

 
/pleɪn/ adj [-er/-est only] (WITH NOTHING ADDED)

Definition

not decorated in any way; with nothing added: The catalog was sent in a plain brown envelope. The food is pretty plain (= prepared simply and without strong flavors), but there’s lots of it.
(Definition of plain adj (WITH NOTHING ADDED) from the Cambridge Academic Content Dictionary © Cambridge University Press)

“plain” in other dictionaries

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