(~s)
1.
Someone who is a ~ of an idea or movement is a supporter of it. (FORMAL)
...the main ~s of their countries’ integration into the world market.
= proponent
? opponent
N-COUNT: oft N of n
2.
A ~ in a play, novel, or real event is one of the main people in it. (FORMAL)
...the ~ of J. D. Salinger’s novel ‘The Catcher in the Rye’...
N-COUNT