n a hollow globule of gas (e.g., air or carbon dioxide)
n a speculative scheme that depends on unstable factors that the planner cannot control
n an impracticable and illusory idea
n a dome-shaped covering made of transparent glass or plastic
v form, produce, or emit bubbles
v flow in an irregular current with a bubbling noise
v rise in bubbles or as if in bubbles
v cause to form bubbles
v expel gas from the stomach