what is glass sightline
- sightÂ·line also sight line (sÄ«tâ²lÄ«nâ²) n. A line of sight, especially one between a spectator and the spectacle in a theater or stadium. sightline (ËsaÉªtËlaÉªn) n an uninterrupted line of vision, as in a theatre, etc, or from a vehicle joining a road. sightâ²line` or sightâ² line`, n. any of the lines of vision between the spectators and the stage or playing area in a theater, stadium, etc.