Of or relating to the Russian Nihilists (nihilist, n. 2); characteristic of their beliefs. Also in extended use.

= nihilistic, adj. 2. Now chiefly historical.

Of or relating to (a member or members of) the Leninist faction of the Russian Social-Democratic Party or (later) the Communist Party.

(a) = Bolshevik, adj. (b) transferred and figurative. Left-wing; uncooperative, recalcitrant.

Designating or relating to the members, policies, etc., of the Mensheviks or (in extended use) of any minority group.

of, pertaining to, or characteristic of, the Bolshevists.

Frequently with capital initial. Originally: revolutionary; republican; anarchistic. Later: communist, socialist; spec. of or relating to the…