bubble · noun C /ˈbʌb.əl/
bubble
C1 a ball of air or gas with liquid around it
Dictionary example:
an air bubble
Learner example:
As a consequence the sea became polluted, and its deep blue color turned into a dirty green, covered with bubbles! (Certificate in Advanced English; C1; Greek)
bubble · verb I /ˈbʌb.əl/
bubble
C2 If a liquid bubbles, balls of air or gas rise to its surface.
Dictionary example:
The soup was bubbling on the stove.
bubble (over) with confidence/enthusiasm, etc.
C1 to be full of a positive emotion or quality
Dictionary example:
The children were bubbling over with excitement.
Learner example:
I feel as if you were bubbling over with excitement as [you] never had done before. (Certificate in Advanced English; C1; Spanish)