Web气泡. bubble uk / ˈbʌb.əl/ us / ˈbʌb.əl/ C1 noun. a ball of gas that appears in a liquid, or a ball formed of air surrounded by liquid that floats in the air: As water begins to boil, bubbles rise to the surface. 水开了,气泡升向水面。. air bubble uk / ˈeə ˌbʌb.əl/ us / ˈer ˌbʌb.əl/ noun.