Standard Lemma guide

irrationally

adv · 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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  • US: Recorded audio is listed in the source snapshot.
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 R AE1 SH AH0 N AH0 L IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
  • CMU ARPABET 2: IH2 R AE1 SH N AH0 L IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adv

Meaning 1

In an irrational manner; without reason; in a manner contrary to reason

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: absurdly

Antonyms: none provided

2

adverb

Meaning 2

in an irrational manner

Definition source: Princeton WordNet 3.0

Examples

  • they acted irrationally

Meaning relationships

Synonyms: none provided

Antonyms: rationally

History

Etymology

Etymology tree English irrational Middle English -ly English -ly English irrationally From irrational + -ly.

Across languages

Translations

7 source translations are retained for this English entry.

  • Catalan: irracionalment — in an irrational manner
  • Esperanto: malracie — in an irrational manner
  • Finnish: irrationaalisesti — in an irrational manner
  • Galician: irracionalmente — in an irrational manner
  • Polish: bezrozumnie — in an irrational manner
  • Portuguese: irracionalmente — in an irrational manner
  • Spanish: irracionalmente — in an irrational manner