What does the word foam mean?

Usage examples for foam

  1. " She is the light on the foam. – Irish Fairy Tales by James Stephens
  2. Still, it was time he went on to Vellan- Clowse; the sun was near the rim of the burning sea, and far below the foam was tinged with fire. – Secret Bread by F. Tennyson Jesse
  3. When they had left their foam and their golden- rod, they had much to see and ask about. – Among the Meadow People by Clara Dillingham Pierson