abbreviation oz (plural oz) [noun] [C] - a unit of weight equal to approximately 28 gramsThere are 16 ounces in one pound.The price of gold has risen by $1.25 an ounce.a 12-oz pack of bacon(informal) An ounce is also 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 realise that this project is bound to fail.
OUNCE
Meaning of OUNCE in English
Cambridge English vocab. Кембриджский английский словарь. 2012