stanchion
noun [ C ] uk/ˈstɑːn.tʃən/ us/ˈstæn.tʃən/
（用于支撑的）支柱，杆
a fixed vertical bar or pole used as a support for something
If this stanchion is removed, the stairs will collapse. 如果把这根支撑柱拿走，楼梯会塌下的。
His 18-yard shot hit the stanchion (= goalpost) and went back into play. 他在离球门18码远处一脚射门，球撞到门柱后又弹回了场地。