Noun: line of sight
- An imaginary straight line along which an observer looks
"The tall building obstructed his line of sight";
- line of vision
- The line between an observer (or camera etc.) and an object being observed
"The architect wants a clear line of sight from every seat in the auditorium";
- sightline, sight line
Derived forms: lines of sight
Type of: line
Encyclopedia: Line of sight