bubble

a nearly spherical body of gas contained in a liquid.

a small globule of gas in a thin liquid envelope.

a globule of air or gas, or a globular vacuum, contained in a solid.

anything that lacks firmness, substance, or permanence; an illusion or delusion.

the act or sound of bubbling.

a spherical or nearly spherical canopy or shelter; dome.

a domelike structure, usually of inflated plastic, used to enclose a swimming pool, tennis court, etc.

a protected, exempt, or unique area, industry, etc..

an area that can be defended, protected, patrolled, etc., or that comes under one's jurisdiction.

a zone of cognitive or psychological isolation, in which one’s preexisting ideas are reinforced through interactions with like-minded people or those with similar social identities.

Economics.��

1. Also called speculative bubble.��Also called asset price bubble.��an inflated speculation that causes an unsustainable increase in the value of goods, property, or other investment.

   The real-estate bubble ruined many investors when it burst.

2. a sudden, temporary change or divergence from a trend.

   In May there was a bubble in car sales, with three percent more being sold than last year.

to form, produce, or release bubbles; effervesce.

to flow or spout with a gurgling noise; gurgle.

to boil.

to speak, move, issue forth, or exist in a lively, sparkling manner; exude cheer.

to seethe or stir, as with excitement.

to cause to bubble; make bubbles in.

Archaic.��to cheat; deceive; swindle.