Definition of straightedge
: a bar or piece of material (as of wood, metal, or plastic) with a straight edge for testing straight lines and surfaces or for cutting along or drawing straight lines
First Known Use of straightedge
STRAIGHTEDGE Defined for English Language Learners
Definition of straightedge for English Language Learners
: a piece of wood, metal, plastic, etc., with a straight edge that you use to make sure something (such as a line or surface) is straight or to make straight lines or cuts
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