(~s, ~ing, ~ed)
1.
Froth is a mass of small bubbles on the surface of a liquid.
...the ~ of bubbles on the top of a glass of beer...
The ~ is blown away.
= foam
N-UNCOUNT
2.
If a liquid ~s, small bubbles appear on its surface.
The sea ~s over my feet...
Add a little of the warmed milk and allow to ~ a little.
VERB: V prep, V
3.
If you refer to an activity or object as ~, you disapprove of it because it appears exciting or attractive, but has very little real value or importance.
No substance at all, just ~...
N-UNCOUNT disapproval