破線(はせん)

はせん
noun
dashed line; broken line
technology
1. dashed line; broken line
A line composed of short dashes with gaps between them, used in diagrams, maps, technical drawings, and road markings. Contrasted with a solid line.
破線(はせん)に沿(そ)って切(き)る。
Cut along the dashed line.
地図(ちず)の破線(はせん)は登山道(とざんどう)を表(あらわ)している。
The dashed lines on the map indicate mountain trails.
設計図(せっけいず)では、見(み)えない部分(ぶぶん)を破線(はせん)で表示(ひょうじ)する決(き)まりになっている。
In technical drawings, it is conventional to show hidden parts with dashed lines.

A compound of 破(は) (broken) and 線(せん) (line). In technical drawing, 破線(はせん) specifically refers to lines made of short dashes, as distinct from 点線(てんせん) (dotted lines made of dots).

Usage

Used in technical drawing, engineering, cartography, graphic design, and everyday instructions (such as "cut here" lines on packaging). In technical drawing standards (JIS), 破線(はせん) specifically indicates hidden edges or outlines.

Common collocations

  • 破線(はせん)で示(しめ)す — to indicate with a dashed line
  • 破線(はせん)に沿(そ)って — along the dashed line
  • 破線(はせん)で囲(かこ)む — to enclose with a dashed line
  • 一点鎖線(いってんさせん) — dash-dot line; another technical line type

Similar words

  • 実線(じっせん) — solid line; the contrasting continuous line
  • 点線(てんせん) — dotted line; a line made of dots rather than dashes
  • 二点鎖線(にてんさせん) — double-dot-dash line; used in technical drawings for centerlines

Related Words

Compare: 実線(じっせん) (solid line)
Compare: 点線(てんせん) (dotted line)
general
Added 2026.3.31 0:16 · Revised 2026.9.2 13:02
20500/20764_hasen