1. lying on the same straight line
Usage: mathematics; geometry

Examples

• The three points A, B, and C are collinear.
• In geometry class, we learned that collinear points cannot form a triangle.
• The architect ensured that all the windows were collinear along the building’s facade.
• To prove the points are collinear, we need to show they have the same slope.
• The stars in Orion’s belt appear collinear from Earth.
• Collinear vectors point in the same or opposite directions.