1. a person who squares something or makes it square
2. a tool or instrument used for making or testing right angles

Examples

• The carpenter used a squarer to ensure the corners were perfectly aligned.
• As the designated squarer on the construction team, he checked all the angles.
• The metal squarer helped her create precise right angles in her woodworking project.
• Without a proper squarer, it’s difficult to build a sturdy frame.
• The squarer confirmed that the wall was perfectly perpendicular to the floor.