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English definition of “ounce”

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 baconMeasurements of weight and mass C2 [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.Words meaning small pieces and amounts
(Definition of ounce from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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