1. A thin, typically spherical or hemispherical enclosure of liquid around gas or air
   "Children love blowing soap bubbles"
    
2. A hollow globule of gas (e.g., air or carbon dioxide)
   "Children blew soap bubbles in the park"; "Tiny bubbles rose to the surface of the carbonated drink"
    
3. A speculative scheme that depends on unstable factors that the planner cannot control
   "a real estate bubble";
   - house of cards
    
4. An impracticable and illusory idea
   "he didn't want to burst the newcomer's bubble"
    
5. A dome-shaped covering made of transparent glass or plastic
   "The observatory had a large bubble to protect the telescope"
    
6. A protective or isolating environment
   "The celebrities lived in a bubble, sheltered from everyday realities"
    
7. [informal] A speech or thought balloon in a comic strip
   "The character's thoughts appeared in a bubble above their head"

1. Form, produce, or emit bubbles
   "The soup was bubbling"
    
2. Rise in bubbles or as if in bubbles
   "bubble to the surface"
    
3. Flow in an irregular current with a bubbling noise
   "bubbling brooks";
   - ripple, babble, guggle, burble, gurgle
    
4. Cause to form bubbles
   "bubble gas through a liquid"
    
5. Expel gas from the stomach
   "The baby bubbled after feeding";
   - burp [informal], belch, eruct [formal], eructate

Derived forms: bubbles, bubbled, bubbling

See also: bubble over

Type of: alter, arise, breathe, change, come up, covering, emit, fancy, fantasy, globule, go, go up, illusion, lift, modify, move up, phantasy [archaic], rise, scheme, sound, strategy, uprise [archaic, literary]

Encyclopedia: Bubble, bubble, toil and trouble