Phrase guide

naturalistic fallacy

noun · 2 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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1

noun

Meaning 1

The fallacious belief that something is automatically good because it is natural or automatically bad because it is unnatural.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: appeal to nature

Antonyms: none provided

2

noun

Meaning 2

Any attempt to define "good" verbally, instead of treating it as an undefined term, in terms of which other terms are defined.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Introduced by British philosopher G. E. Moore in his 1903 book Principia Ethica.