*intrenchment*

n. [ From Intrench. ] [ 1913 Webster ]

1. The act of intrenching or the state of being intrenched. [ 1913 Webster ]

2. (Mil.) Any defensive work consisting of at least a trench or ditch and a parapet made from the earth thrown up in making such a ditch. [ 1913 Webster ]

On our side, we have thrown up intrenchments on Winter and Prospect Hills. Washington. [ 1913 Webster ]

3. Any defense or protection. [ 1913 Webster ]

4. An encroachment or infringement. [ 1913 Webster ]

The slight intrenchment upon individual freedom. Southey. [ 1913 Webster ]