ounce

noun

/aʊns/

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[countable]
(abbreviation oz)
(in Britain and North America) a unit for measuring weight, 116 of a pound, equal to 28.35 grams盎司（重量单位，¹⁄₁₆ 磅，等于 28.35 克） see also fluid ounceTopics Cooking and eatingc1, Maths and measurementc1
[singular] ounce of something (informal) (used especially with negatives尤与否定词连用) a very small quantity of something少许；少量；一点点；丝毫
- There's not an ounce of truth in her story.她所说的一点儿都不真实。

Word OriginMiddle English: from Old French unce, from Latin uncia ‘twelfth part (of a pound or foot)’; compare with inch.

Idioms

an ounce of prevention is better than a pound of cure (US English)

(British English prevention is better than cure)

(saying) it is better to stop something bad from happening rather than try to deal with the problems after it has happened预防优于补救；防患于未然是上策