A member of a formally constituted Communist Party. / A proponent of the kind of communism formally espoused by such a party, typically either Marxism, or more commonly, Leninism or Maoism.

Of or relating to a formally constituted Communist Party. / (inexact, sometimes proscribed) Alternative letter-case form of communist, of or related to the general philosophy of communism.

Any far-left political ideology or philosophy advocating holding the production of resources collectively, especially by seizing it through revolution.

An advocate of a society based on the common ownership of property; a proponent of communism. / (nonstandard) Any revolutionary or subversive radical.

Of, relating to, supporting, or advocating communism.

plural of communist

(archaic, derogatory, politics) A Chinese communist.

In a communistic manner.

Characteristic of communism. / (zoology) Living or having their nests in common.

Non-Oxford British English standard spelling of communization.