Definition of straightedge in English:

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straightedge

Pronunciation: /ˈstrādˌej/

noun

A bar with one accurately straight edge, used for testing whether something else is straight.
Example sentences
  • I clamp a steel straight edge in a vise and just draw the surface over the steel edge a few times.
  • They checked to see if the slab would easily wrap around the pipe and then used a straight edge to cut out an appropriate-sized rectangle from the clay.
  • Measuring instruments, like levels and straight edges, are in that anomalous class of hand tools which do not directly affect the work piece, but only report on its status.

adjective

chiefly US
(Especially among fans of hardcore punk music) having an ascetic or abstinent lifestyle: he’s so straightedge that he won’t even take Tylenol when he has a headache

For editors and proofreaders

Syllabification: straight·edge

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