Pillar

A shaft or upright member or support holding up the roof. Also called a post. The A-post holds up the windshield. The B-post is behind the front door about in the middle of the side of the roof. The C-post holds up the rear window. In station wagons, another post is placed between the B-post and the last post so that it becomes the C-post and the last post is the D-post. See A-pillar, B-pillar, C-pillar, cabin pillar, center pillar, D-pillar, dogleg pillar, dogleg pillar, door pillar switch, door pillar, front pillar, hinge pillar reinforcement, hinge pillar, latching pillar, latch pillar, lock pillar, rear cabin pillar