'Trench' in the Bible

And with the stones he built an altar in the name of the LORD: and he made a trench about the altar, as great as would contain two measures of seed.

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

Then the fire of the LORD fell, and consumed the burnt sacrifice, and the wood, and the stones, and the dust, and licked up the water that was in the trench.