1to block up (a road, pipe etc)
2to stop up (a hole)
3(fig.) (of a person) choked up with anxiety or stress
4wall (literary)
5(classifier for walls)
Examples
yǒu有kē棵shù树dǎo倒le了xià lai下来，bǎ把lù路dǔ堵zhù住le了。
有棵树倒了下来，把路堵住了。
A fallen tree obstructed the road.
每一堵墙都是一扇门。
Every wall is a door.
建造这堵墙是为了把人隔在外面还是把他们留在里面？
Was this wall built to keep people out or to keep them in?