Song (noun)

1. A musical composition for voices or instruments with words.
2. A short poem or set of words set to music or meant to be sung.
3. A melody or series of notes that make up a piece of music.

Origin:

From old english sang, from proto-germanic *sangą, from proto-indo-european *sénǵʰos. the word was first used in the 9th century.

Examples:

1. I love to sing the song.
2. This song is my favorite.
3. He wrote a song for his girlfriend.
4. The bird is singing a beautiful song.
5. The song is playing on the radio.