- 1 a structure from which water is sent up into the air by a pump, used to decorate parks, etc. see also water fountain
- 2a strong flow of liquid or of another substance that is forced into the air The amplifier exploded in a fountain of sparks. The shell exploded, sending a fountain of sand and grit into the air.
- 3a rich source or supply of something Tourism is a fountain of wealth for the city.