From Longman Dictionary of Contemporary Englishounceounce /aʊns/ ●●● S3 W3 noun [countable] (written abbreviation oz) 1 TMa unit for measuring weight, equal to 28.35 grams. There are 16 ounces in a pound. → fluid ounce2 → an ounce of sense/truth/decency etc3 → every (last) ounce of courage/energy/strength etc4 → an ounce of prevention (is worth a pound of cure)5 → not an ounce of fat (on somebody)
Examples from the Corpus
ounce• February gold fell 90 cents to $ 399. 30 an ounce on Commodity Exchange.• Where a cereal is very light, like cornflakes, an ounce will comfortably fill the usual breakfast bowl.• Hardly an ounce of flesh anywhere.• This was the real Janir, I thought, the one without an ounce of shyness or indecision.• It was the centrifuge that yielded the last cull, a final ounce of bits of metal.• The Warriors needed every lean ounce of effort Smith provided in the fourth quarter.• It weighs seven pounds twelve ounces, is ten and a half inches long and nine inches wide.From Longman Business Dictionaryounceounce /aʊns/ written abbreviation oz. noun [countable] a measurement of weight equal to 28.35 gramsOrigin ounce (1300-1400) Old French unce, from Latin uncia “twelfth part, ounce” 