Learner's definition of FOAM
[noncount]
1
: a mass of small bubbles that are formed in or on a liquid泡沫 2
: a substance that is like a thick liquid made of many small bubbles泡沫剂 3
: a soft material that is used to make many products : foam rubber泡沫橡胶;海绵橡胶 —
often used before another noun常用于另一名词前 — foaminess
/ˈfoʊminəs/ noun [noncount] — foamy
/ˈfoʊmi/ adjective foamier; foamiest 2 foam /ˈfoʊm/ verb
foams; foamed; foaming
foams; foamed; foaming
Learner's definition of FOAM
[no object]
foam at the mouth
1
: to produce foam from the mouth because of illness or excitement(由于生病或激动)口吐白沫 2
informal : to be very angry about something震怒;大怒