/ frɒθ; NAmE frɔːθ/ noun , verb
■ noun
1.
[ U ] a mass of small bubbles, especially on the surface of a liquid
SYN foam :
a glass of beer with thick froth on top
2.
[ U ] ideas, activities, etc. that seem attractive and enjoyable but have no real value
3.
[ sing. ] froth of sth something that looks like a mass of small bubbles on liquid :
a froth of black lace
■ verb
1.
if a liquid froths , or if sb/sth froths it, a mass of small bubbles appears on the surface : [ v ]
a cup of frothing coffee
[also vn ]
2.
[ v ] to produce a lot of saliva (= liquid in your mouth) :
The dog was frothing at the mouth .
( figurative )
He frothed at the mouth (= was very angry) when I asked for more money.
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WORD ORIGIN
late Middle English : from Old Norse frotha , frauth .