ounce Meaning in the Cambridge English Dictionary
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Meaning of “ounce” in the English Dictionary

"ounce" in British English

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ouncenoun

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

"ounce" in American English

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ouncenoun [C]

 us   /ɑʊns/ (abbreviation oz.)

ounce noun [C] (WEIGHT)

a ​unit of ​measurement of ​weightequal to 1/16pound or 28 ​grams An ounce is also a very ​smallamount: If he’s got an ounce of ​commonsense, he’ll ​realize that this ​project is ​bound to ​fail.

ounce noun [C] (VOLUME)

(Definition of ounce from the Cambridge Academic Content Dictionary © Cambridge University Press)

"ounce" in Business English

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ouncenoun [C]

uk   us   /aʊns/ ( written abbreviation oz)
[C] MEASURES a ​unit of ​weightequal to 28.35 ​grams: There are 16 ounces in one ​pound. a 12-oz can of cola
(Definition of ounce from the Cambridge Business English Dictionary © Cambridge University Press)
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