A BILLBOARD Chart Entry is a SONG that has been released and has made it onto the BILLBOARD charts. This is a prestigious accomplishment for any artist, as it means their SONG has been popular enough to make it onto the list of the most popular songs in the country. The term 'BILLBOARD Chart Entry' can be broken down into two parts: 'BILLBOARD' and 'Chart Entry'. BILLBOARD is a magazine and website that tracks the popularity of songs across the United States, and 'Chart Entry' refers to a SONG that has made it onto the BILLBOARD chart.