Definition of: bubble

(bub′əl) noun
1. A vesicle of cohesive liquid, filled with air or other gas.
2. A globule of air or other gas in any confined space, as in a liquid or solid substance.
3. Anything unsubstantial; a delusion; cheat; fraud.
4. The process or sound of bubbling. [<v.]
—v. ·bled, ·bling v.t.
1. To form bubbles in, as a liquid.
2. To emit or utter by or as by bubbling: He bubbled the good news.
3. Archaic To cheat; swindle.
—v.i.
4. To form bubbles; rise in bubbles.
5. To move or flow with a gurgling sound.
6. To express emotion, joy, etc., with a gurgling sound: He bubbled with glee. [ME buble; prob. imit.]
—bub′bly adjective