(~s)
1.
A ~ is a large structure, usually made of stone, which is built to remind people of an event in history or of a famous person.
N-COUNT
2.
A ~ is something such as a castle or bridge which was built a very long time ago and is regarded as an important part of a country’s history.
...the ancient ~s of England, Scotland and Wales.
N-COUNT
3.
If you describe something as a ~ to someone’s qualities, you mean that it is a very good example of the results or effects of those qualities.
By his international achievements he leaves a fitting ~ to his beliefs.
N-COUNT: N to n