主しゅ戦せん線せんMeaningsNoun1. main battle line; primary frontKanji used主(one's) master戦war線lineComposed of主しゅ戦せんadvocacy of warNoun線せんline; stripe; stria; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad); track; route; …Noun