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ounce1

Pronunciation: /aʊns/

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Definition of ounce

noun

1 (abbreviation: oz) a unit of weight of one sixteenth of a pound avoirdupois (approximately 28 grams): melt three ounces of butter in a large frying pan
a unit of one twelfth of a pound troy or apothecaries' measure, equal to 480 grains (approximately 31 grams).