(~s)
1.
An ~ is a person who designs buildings.
N-COUNT
2.
You can use ~ to refer to a person who plans large projects such as landscaping or railways.
...Paul Andreu, chief ~ of French railways.
N-COUNT: with supp, oft N of n
3.
The ~ of an idea, event, or institution is the person who invented it or made it happen. (FORMAL)
...Russia’s chief ~ of economic reform.
N-COUNT: oft N of n