Standard Lemma guide

rationalsphere

noun · 1 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

An online community of individuals, centered around the forum LessWrong and the blog Slate Star Codex, who discuss philosophy, psychology, and futurism through the lens of Bayesianism and rationality.

Definition source: English Wiktionary via Wiktextract

Usage: no-plural

Qualifier: preceded with the

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

rational + or rationalist + -sphere (“designating a particular realm or interest of a group of people, object, etc”)