| n. | 1. | A thin film of liquid inflated with air or gas; |
| 2. | A small quantity of air or gas within a liquid body; | |
| 3. | A globule of air, or globular vacuum, in a transparent solid; | |
| 4. | A small, hollow, floating bead or globe, formerly used for testing the strength of spirits. | |
| 5. | The globule of air in the spirit tube of a level. | |
| 6. | Anything that wants firmness or solidity; that which is more specious than real; a false show; a cheat or fraud; a delusive scheme; an empty project; a dishonest speculation; | |
| 7. | A person deceived by an empty project; a gull. | |
| v. i. | 1. | To rise in bubbles, as liquids when boiling or agitated; to contain bubbles. |
| 2. | To run with a gurgling noise, as if forming bubbles; | |
| 3. | To sing with a gurgling or warbling sound. |
| Noun | 1. | bubble - a hollow globule of gas (e.g., air or carbon dioxide) |
| 2. | bubble - a speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble" Synonyms: house of cards | |
| 3. | bubble - an impracticable and illusory idea; "he didn't want to burst the newcomer's bubble" | |
| 4. | bubble - a dome-shaped covering made of transparent glass or plastic | |
| Verb | 1. | bubble - form, produce, or emit bubbles; "The soup was bubbling" |
| 2. | bubble - flow in an irregular current with a bubbling noise; "babbling brooks" | |
| 3. | bubble - expel gas from the stomach; "In China it is polite to burp at the table" |
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