Definitions
1.nounA person who writes in support of one opinion, doctrine, or system, in opposition to another; one skilled in polemics; a controversialist; a disputant.
2.nounAn argument or controversy.
3.nounA strong verbal or written attack on someone or something.
4.nounThe art or practice of making arguments or controversies.
5.nounThe refutation of errors in theological doctrine.