Learn how to say Ounce correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word ounce:
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).
2a very small amount of something:
Robyn summoned up every ounce of strength
Middle English: from Old French unce, from Latin uncia ‘twelfth part (of a pound or foot)’; compare with inch1