Definition of A-pillar
plural A-pillars
also A-posts
:either one of two support posts that are positioned on either side of the windshield of a vehicle and connect the roof to the body
- Changing the A-pillars meant that additional changes would ripple into the roof and the windshield, into the doors and door glass, into the fenders, into the hood.
- —James Schefter, All Corvettes Are Red, 1998
- Raise or lower the door hinges on the A-pillar until the door is the correct height.
- —Mike Allen, Popular Mechanics, November 1998
