a. - Of or pertaining to controversy; maintaining, or involving, controversy; controversial; disputative; as, a polemic discourse or essay; polemic theology.
a. - Engaged in, or addicted to, polemics, or to controversy; disputations; as, a polemic writer.
n. - One who writes in support of one opinion, doctrine, or system, in opposition to another; one skilled in polemics; a controversialist; a disputant.
n. - A polemic argument or controversy.