'Trench' in the Bible

And they came and besieged him in Abel-Beth-Maacah, and they cast up a bank against the city, and it was raised in the trench; and all the people that were with Joab sapped the wall, to throw it down.

and with the stones he built an altar in the name of Jehovah, and made a trench round about the altar, of the capacity of two measures of seed;

And the water ran round about the altar; and he filled the trench also with water.

And the fire of Jehovah fell, and consumed the burnt-offering, and the wood, and the stones, and the dust, and licked up the water that was in the trench.