1. （书面或口头的）争辩，辩论，论战
A polemic is a very strong written or spoken attack on, or defence of, a particular belief or opinion.

2. 争辩术；辩论法
Polemics is the skill or practice of arguing very strongly for or against a belief or opinion.

1. a controversy (especially over a belief or dogma)

2. a writer who argues in opposition to others (especially in theology)

Synonym: polemicistpolemist