noun · a thick block of stone, wood, or concrete used as a support, pillar, or pier

工人们正在修补大桥的桥墩。

measure word · a classifier for clusters of plants, such as grass or seedlings

他在花园里种了几墩芍药。

measure word · a classifier for rounds or tricks in a card game

他手里还剩最后两墩牌。

noun · an archaic term for an observation tower used for defense

城墙外矗立着几座古代的墩台。