Standard Lemma guide

ultraleft

adj · noun · 9 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • General-American, Received-Pronunciation: /ˌʌl.tɹəˈlɛft/

1

adj

Meaning 1

Of or pertaining to ultraleftism.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Of a leftist movement or ideology: extreme and uncompromising; sectarian.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory

Qualifier: far-left

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Extremely left-wing.

Definition source: English Wiktionary via Wiktextract

Qualifier: generally

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The strain or strains of leftism often associated with left communism, which practice rejection of both social democracy and state socialism as well as opposition to Leninism; i.e, ultraleftism.

Definition source: English Wiktionary via Wiktextract

Usage: collective, uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

The left communist tendency characterized by a synthesis of Dutch-German council communism and Italian left communism.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Qualifier: strictly

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

Italian left communism; Bordigism.

Definition source: English Wiktionary via Wiktextract

Usage: broadly, uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

Leftism collectively considered uncompromising and sectarian, especially anti-Leninist Marxism.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, uncountable, usually

Qualifier: far-left

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

An adherent of ultraleftism.

Definition source: English Wiktionary via Wiktextract

Usage: countable, rare, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

The most extreme ideologies of the political left.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Qualifier: generally

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Ultimately a calque of Russian ультралевый (ulʹtralevyj, “ultraleft”, adjective), in the sense of "pertaining to extreme or uncompromising leftist ideology." From ультра- (ulʹtra-, “ultra; extremely”) + левый (levyj, “left”, adjective), equivalent to ultra- + left. Originally applied pejoratively by the Bolsheviks against libertarian socialists and early left communists, and later by Stalinists against Trotskyists; now also used neutrally to refer to certain ideologies associated with left communism or traditional Marxism. The modern meanings are partially semantically loaned from French ultra-gauche.