noun
drawing red lines; redlining
General act of drawing lines in red ink, often for emphasis or correction.
先生は答案に朱引きを入れて間違いを指摘した。
The teacher drew red lines on the exam paper to point out mistakes.
noun
red lines marking town limits (Edo period)
Historical term for red boundary lines drawn on maps to indicate town or district limits during the Edo period.
江戸時代の地図には、町の境界を示す朱引きが引かれていた。
On maps from the Edo period, red lines were drawn to show town boundaries.
noun
red lines marking nouns in kanbun texts
Archaic use: in classical Chinese texts read by Japanese scholars, red lines were drawn beside nouns to aid parsing.
漢文の訓読では、名詞に朱引きを施して読みやすくすることがあった。
In the Japanese reading of classical Chinese, red lines were sometimes added next to nouns to make them easier to read.
Compound of 朱 (しゅ, 'vermilion, red') and 引き (ひき, 'drawing, pulling'), from the verb 引く (ひく, 'to draw'). The exact historical derivation is uncertain, but the term straightforwardly describes the act of drawing with red ink.