"blowing bubbles is a favourite pastime of many children"

• an air- or gas-filled spherical cavity in a liquid or a solidified liquid such as glass

  "the white foamy part of a broken wave is largely made up of air bubbles"

"we both lived in a bubble, the kind provided by occupying a privileged pied-à-terre in Greenwich Village"

• used to refer to a significant, usually rapid, increase in asset prices that is soon followed by a collapse in prices and typically arises from speculation or enthusiasm rather than intrinsic increases in value

  "the US economy squandered trillions as a result of the 1990s stock market bubble"

"piglets born into a sterile bubble"

• a place or position that is protected from danger or unpleasant reality

  "they are not on tour packages seeing foreign ports from a bubble"

• (during an outbreak of an infectious disease) a restricted group of people whose members are allowed to be in close proximity when maintaining a physical distance is otherwise required

  "you cannot stay overnight in another person's home, unless you've formed a bubble with them"

"a speech bubble"

"a pot of coffee bubbled away on the stove"

• make a bubbling sound

  "close by, a stream bubbled along through reeds and rushes"

• be filled with an irrepressible positive feeling

  "Ellen was bubbling with enthusiasm"

• (of a feeling) become more intense and approach the point of being expressed

  "the fury bubbling up inside her"