1.  marxist(n = noun.person) - an advocate of Marxism;
is a kind of advocate, advocator, exponent, proponent
Derived form noun marxism₁

2.  marxist(n = noun.person) bolshevik, bolshie, bolshy, red - emotionally charged terms used to refer to extreme radicals or revolutionaries;
is a kind of radical

   marxist(a = adj.pert) - following the ideas of Marx and Engels;