I. froth 1 /frɒθ $ frɒːθ/ BrE AmE noun
[ Date: 1300-1400 ; Language: Old Norse ; Origin: frotha ]
1 . [singular, uncountable] a mass of small ↑ bubble s on the top of a liquid SYN foam :
‘Excellent beer,’ he said, wiping the froth from his mouth.
2 . [singular, uncountable] small white ↑ bubble s of ↑ saliva around a person’s or animal’s mouth
3 . [uncountable] talk or ideas that are attractive but have no real value or meaning:
The book has too much froth and not enough fact.
II. froth 2 BrE AmE verb [intransitive]
1 . ( also froth up ) if a liquid froths, it produces or contains a lot of small ↑ bubble s on top:
When you first open the bottle the beer will froth for a few seconds.
2 . if someone’s mouth froths, ↑ saliva comes out as small white ↑ bubble s
3 . froth at the mouth
a) to have ↑ saliva coming out of your mouth as small white ↑ bubble s
b) informal to be extremely angry