S: (n) line (in games or sports; a mark indicating positions or bounds of the playing area)
S: (n) mark, print (a visible indication made on a surface) "some previous reader had covered the pages with dozens of marks"; "paw prints were everywhere"
S: (n) indication, indicant (something that serves to indicate or suggest) "an indication of foul play"; "indications of strain"; "symptoms are the prime indicants of disease"
S: (n) communication (something that is communicated by or to or between people or groups)