noun
a line; a boundary; a dividing line
Often used figuratively for a clear boundary or distinction, such as between two concepts, groups, or stages. Common in phrases like 一線を画す (draw a line, make a distinction).
プロとアマの間には明確な一線がある。
There is a clear line between professionals and amateurs.
彼の作品は他の作家
His work stands apart from that of other writers.