foam 2022.12.06 foamとは 意味・定義・例文 Noun 名詞 1. a mass of small white bubbles formed on the surface of liquid; froth 泡, あぶく The surface of the water was covered with foam. Verb 動詞 1. produce foam; make bubbles 泡立つ|~を泡立たせる The waves are foaming.