I don't the meaning of Item Songs : Zarine Khan

Actress Zarine Khan told that she don't now the meaning of Item songs and nor why this name is given to this song. Zarine who was seen in songs like "Character Dhela' and 'Reddy', now she is seen in Ram Gopal Varma's Veerappan song 'Khallas Virappan, for which she was appreciated a lot. Zarine said, 'Well I did ‘Khallas’ because it’s one of my favourite songs. I was very happy that I had the opportunity to recreate the magic of ‘Khallas'. As for item songs, I don’t even know what that means and why the term ‘item’ is used for a song.' She said, 'Such songs should be called “promotional or special” as they are done by someone, who is not part of the film. | Zarina Khan will be seen in upcomig film 'Divine Lover'.