sightline

or sight line

[ sahyt-lahyn ]
/ ˈsaɪtˌlaɪn /

noun

any of the lines of sight between the spectators and the stage or playing area in a theater, stadium, etc.: Some of the sightlines are blocked by columns.

Origin of sightline

First recorded in 1915–20; sight + line1

British Dictionary definitions for sightline

sightline
/ (ˈsaɪtˌlaɪn) /

noun

an uninterrupted line of vision, as in a theatre, etc, or from a vehicle joining a road