be perpendicular to somethingHMif one line is perpendicular to another line, they form an angle of 90 degrees 〔线〕与某物成直角 SYN at right angles to a road perpendicular to the highway 和那条公路垂直的道路
be perpendicular to something• This shows the simple case of a spin axis which is perpendicular to the line of sight.• The viewpoint is perpendicular to the orbital plane.
→ be perpendicular to something at perpendicular1(1)