Bubble

1. A thin film of liquid inflated with air or gas; as, a soap bubble; bubbles on the surface of a river.

   Beads of sweat have stood upon thy brow, Like bubbles in a late disturbed stream.

2. A small quantity of air or gas within a liquid body; as, bubbles rising in champagne or aërated waters.
3. A globule of air, or globular vacuum, in a transparent solid; as, bubbles in window glass, or in a lens.
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; as, the South Sea bubble.

   Then a soldier . . . Seeking the bubble reputation Even in the cannon's mouth.

7. A person deceived by an empty project; a gull. [Obs.]

imp. & p. p. Bubbled; p. pr. & vb. n. Bubbling

1. To rise in bubbles, as liquids when boiling or agitated; to contain bubbles.

   The milk that bubbled in the pail.

2. To run with a gurgling noise, as if forming bubbles; as, a bubbling stream.
3. To sing with a gurgling or warbling sound.

   At mine ear Bubbled the nightingale and heeded not.