What is the meaning of the word perpendicular Share with your friends Share 1 Nishtha Verma answered this Perpendicular simply means 'at right angles'. A line isperpendicular to another if they meet at 90 degrees. 2 View Full Answer Sai Kaushik answered this PERPENDICULAR is when two lines are joining at 90 degrees. 0 Nashra Rania answered this Thanks nishtha 0