1. (rugby) a set piece where a player throws the ball into play, and both teams can contest for possession
   "The tall forward was an asset in the line-out, often winning possession for his team"
    
2. An output socket, e.g. for sound from a music system
   "He connected the speakers to the line-out on the back of the amplifier"

Derived forms: line-outs

Encyclopedia: Line-out