Definition of "bubble" []

• A thin, usually spherical or hemispherical film of liquid filled with air or gas: a soap bubble. (noun)
• A globular body of air or gas formed within a liquid: air bubbles rising to the surface. (noun)
• A pocket formed in a solid by air or gas that is trapped, as during cooling or hardening. (noun)
• The act or process of forming bubbles. (noun)
• A sound made by or as if by the forming and bursting of bubbles. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "_Bubble, bubble, bubble, bubble_, came from the basin as the boy thrust in his face."
• "When Obama sells 10 tons to lower the national debt those stuck holding gold will know what the term bubble means."
• "But This Might Be Misguided After being buffeted by the dot-com, housing and credit bubbles -- not to mention the Chinese stock-market bubble -- there is a readiness by people on Wall Street and elsewhere to ascribe the term bubble to all sorts of things."