- bubble [bub′əl]n.[ME bobel, of echoic orig., as in MDu bubbel]1. a very thin film of liquid forming a ball around air or gas [soap bubbles]2. a tiny ball of air or gas in a liquid or solid, as in carbonated water, glass, etc.3. anything shaped like a bubble, sphere, or hemisphere, as a plastic or glass dome4.a) anything that is ephemeral or insubstantialb) any idea, scheme, etc. that seems plausible at first but quickly shows itself to be worthless or misleading5. the act, process, or sound of bubblingvi.bubbled, bubbling [ME bobelen]1. to make bubbles; rise in bubbles; boil; foam; effervesce2. to make a boiling or gurgling soundvt.1. to form bubbles in; make bubble☆ 2. Informal to cause (a baby) to burp——————bubble over1. to overflow, as boiling liquid2. to be unrestrained in expressing one's enthusiasm, zest, etc.——————☆ on the bubbleInformal in a situation in which the outcome is uncertain but already in the process of being determined or decided
English World dictionary. V. Neufeldt. 2014.