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1[uncountable] a mass of small bubbles, especially on the surface of a liquid synonym foam a glass of beer with thick froth on top The horse's bit was covered with white froth.
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- 2[uncountable] ideas, activities, etc. that seem attractive and enjoyable but have no real value
- 3[singular] froth of something something that looks like a mass of small bubbles on liquid a froth of black lace
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