What does re mean in the song from the sound of music?

In the song "Do-Re-Mi" from The Sound of Music, "re" represents the second note in the solfège scale, which is used for teaching musical notes. The lyrics associate "re" with the idea of "a drop of golden sun," emphasizing its connection to warmth and positivity. This playful approach to music education helps convey the joy of learning and experiencing music through relatable imagery.