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English definition of “ounce”

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ounce

noun uk   /aʊns/ us  
C1 [C] ( written abbreviation oz) a unit of weight equal to approximately 28 grams: There are 16 ounces in one pound. a twelve-oz pack of baconC2 [S] informal a very small amount: She can eat as much as she wants and she never puts on an ounce (= her weight does not increase). If he's got an ounce of common sense, he'll realize that this project is bound to fail.
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(Definition of ounce from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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