A song that has a melody and,often,words that are sung by a vocalist.ThA song that has a melody and,often,words that are sung by a vocalist.The words of this song, as a whole are called the lyrics,and they may include verses that tell a tale or move a story along ,and refrains, or short phe words of this song, as a whole are called the lyrics,and they may include verses that tell a tale or move a story along ,and refrains, or short phrases repeated at the end of each verse.