Adjective

(en adjective)

Of, pertaining to, or exhibiting opposition

*{{quote-news, year=2007, date=March 10, author=Steven Lee Myers, title=Kasparov, Building Opposition to Putin, work=New York Times citation

, passage=And he has brought to oppositional politics the same energy and aggression that characterized his chess, attacking Mr. Putin and the Kremlin — or the regime, as he repeatedly calls it — with language rarely spoken so bluntly in Russia. }}