fountain [‘faʊntən] n.
1.A fountain is an ornamental feature in a pool or lake which consists of a long narrow stream of water that is forced up into the air by a pump.
2.A fountain of a liquid is an amount of it which is sent up into the air and falls back.
eg.The volcano spewed a fountain of molten rock 650 feet in the air.
3.a rich source or supply of something.
eg. Tourism is a fountain of wealth for the city.