Collins Chinese Dictionary Plus (3rd edition), 2011:
堵
dǔI 动
1
(=堵塞) block
- 堵车(車) dǔchē traffic jam
- 水管子堵了。 Shuǐguǎnzi dǔ le. The water pipe was blocked.
- 他们(們)把漏水的地方给(給)堵上了。 Tāmen bǎ lòushuǐ de dìfang gěi dǔshàng le.
They blocked up the leak.
- 因为(為)车(車)辆(輛)过(過)多,公路上很堵。 Yīnwèi chēliàng guòduō, gōnglù shang hěn dǔ.
The road was blocked due to an excessive number of vehicles.
2 (=发闷) suffocate
- 房间(間)很闷(悶),我胸口堵得很。 Fángjiān hěn mēn,wǒ xiōngkǒu dǔ de hěn. The room was really stuffy and I felt quite suffocated.
II 量
- 一堵墙(牆) yī dǔ qiáng a wall
measure word, used for walls