two blue, 12-inch wide lines running parallel across the ice, each 60 feet from the goal; they divide the rink into three zones called the attacking, defending and neutral (or center) zones; defending blue line is the line closer to a player's own net; attacking blue line is the one farther from his net; used in determining offsides.

Blue Lines is the debut album by British electronica group Massive Attack, released on August 6, 1991 (see 1991 in music) by Virgin Records. Generally considered the first trip hop album, though the term wasn't coined until several years later, Blue Lines was a massive success in the United Kingdom, though sales were limited elsewhere. A fusion of electronic music, hip hop and dub music, the album established Massive Attack as one of the innovative British bands of the 1990s.