1an ornamental structure in a pool or lake from which one or more jets of water are pumped into the air. a thing that spurts or cascades into the air:little fountains of dust
chiefly literary a natural spring of water.
a source of a desirable quality:the government always quote this report as the fountain of truth
3 Heraldry a roundel barry wavy argent and azure (i.e. a circle with wavy horizontal stripes of white and blue).
spurt or cascade like a fountain:a river of cold air fountained into the hold