線 (sen) means “line” | MotiTan Japanese Dictionary

More examples

ノートに線を引きます。nō to ni sen o hi ki ma su

I draw a line in my notebook.

ノートの中央に線があります。nō to no chū ō ni sen ga a ri ma su

There is a line in the middle of the notebook.

Describes a narrow, continuous mark or path that runs across a surface or along a route.

筋suji: A narrow mark, stripe, or visible path on or across a surface.

細長く連続している筋や、二つの点を結ぶように引かれたもの。hoso naga ku ren zoku shi te i ru suji ya futa tsu no ten o musu bu yō ni hi ka re ta mo no

線 (sen, "line") is a Sino-Japanese word borrowed from Chinese 線, whose earlier meaning was "thread" and later extended to "line."

In Japanese railway names, 線 (sen) often follows the route name, as in 山手線 (Yamanote-sen).