/ ˌmiːdiˈəʊkə(r); NAmE -ˈoʊkər/ adjective
( disapproving ) not very good; of only average standard :
a mediocre musician / talent / performance
I thought the play was only mediocre.
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WORD ORIGIN
late 16th cent.: from French médiocre , from Latin mediocris of middle height or degree, literally somewhat mountainous, from medius middle + ocris rugged mountain.