green line

green line (plural green lines)

1. A demarcation line, such as that separating Israeli and Palestinian/other Arab territories according to a 1949 armistice, or that separating the Republic of Cyprus from the Turkish Republic of Northern Cyprus.
2. (Should we delete⁽⁺⁾ this sense?) An indicator of grammar errors in some word processing applications.

   I am getting a green line. Where have I gone wrong?

• Nile green