'Straightedge' definitions:
Definition of 'straightedge'
From: WordNet
noun
Hand tool consisting of a flat rigid rectangular bar (metal or wood) that can be used to draw straight lines (or test their straightness)
Definition of 'Straightedge'
From: GCIDE
- Straightedge \Straight"edge`\, n. A board, or piece of wood or metal, having one edge perfectly straight, -- used to ascertain whether a line is straight or a surface even, and for drawing straight lines. [1913 Webster]