∙ A spherically contained volume of air or other gas, especially one made from soapy liquid.
∙ A small spherical cavity in a solid material.
∙ Anything resembling a hollow sphere.
∙ A period of intense speculation in a market, causing prices to rise quickly to irrational levels as the metaphorical bubble expands, and then fall even more quickly as the bubble bursts (eg the South Sea Bubble). economics
∙ Someone who has been ‘bubbled’ or fooled; a dupe. obsolete
∙ The emotional and/or physical atmosphere in which the subject is immersed; circumstances, ambience. figuratively
∙ a Greek (also: bubble and squeak) Cockney rhyming slang
∙ A small, hollow, floating bead or globe, formerly used for testing the strength of spirits.
∙ The globule of air in the spirit tube of a level.
∙ Anything lacking firmness or solidity; a cheat or fraud; an empty project.
∙ A laugh. (also: bubble bath) Cockney rhyming slang
∙ Any of the small magnetized areas that make up bubble memory. computing
∙ The point in a poker tournament when the last player without a prize loses all their chips and leaves the game, leaving only players that are going to win prizes. (e.g., if the last remaining 9 players win prizes, then the point when the 10th player leaves the tournament) poker
Verb
∙ To produce bubbles, to rise up in bubbles (such as in foods cooking or liquids boiling). intransitive
∙ To churn or foment, as if wishing to rise to the surface. intransitive, figuratively
∙ To cheat, delude. transitive, archaic
∙ To cry, weep. intransitive, Scotland and Northern England