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English definition of “ounce”

ounce

noun     /aʊns/
[C] (written abbreviation oz) a unit for measuring weight, equal to 28.35 grams → See also fluid ounceMeasurements of weight and massArea, mass, weight and volume in general
not have an ounce of sth to not have any of a quality or emotion: His new novel doesn't have an ounce of originality.Lacking thingsScarce, inadequate and not enoughEssential or necessary
every ounce of sth all of a quality or emotion that is available: He deserves every ounce of support that we can give him.Maximum and minimum
(Definition of ounce noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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