noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The ideology of the ultraleft, associated with left communism, characterized by a rejection of both social democracy and state socialism in favor of traditional Marxism, including opposition to Leninism and the vanguard party. uncountable, usually
2. 2
   Italian left communism; Bordigism. broadly, specifically, uncountable, usually
3. 3
   Extreme or uncompromising leftist ideology, especially strict adherence to orthodox Marxism. derogatory, uncountable, usually

Etymology

From ultraleft + -ism. By surface analysis, ultra- + leftism.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.