第だい一いっ線せんTop 15000MeaningsNoun1. the front (of a battlefield); forefrontKanji used第ordinal number一one線linePitch accentだいいっせんComposed of第だい一いちfirst; foremost; number one; most important; best; greatest; most; above all; besides; in any case; …No-adjective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; …NounExamples1彼かの女じょは今いまも第だい一いっ線せんで活かつ躍やくしている。She's still active in the front lines.