tautology
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tautology
- /tɔːˈtɒləd͡ʒi/ UK
- /toːˈtɔləd͡ʒi/ Australia, British, New Zealand
- /tɔˈtɑləd͡ʒi/ US
- /tɑˈtɑləd͡ʒi/ US, cot caught merger
- /tɔˈtɔləd͡ʒe/ Scotland
Rhymes with -ɒlədʒi
Where it comes from
From Late Latin tautologia, from Ancient Greek ταὐτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”). By surface analysis, tauto- + -logy.
noun tautologies
- Redundant use of words, a pleonasm, an unnecessary and tedious repetition. It is tautology to say, "Forward Planning".
- An expression that features tautology. The expression "raze to the ground" is a tautology, since the word "raze" includes the notion "to the ground".
- A statement that is true for all truth values of its propositional variables.
- A statement that is true for all truth values of its Boolean atoms.
Opposite: contradiction in terms, contradiction, oxymoron
Thesaurus
noun
Opposite: contradiction in terms, contradiction, oxymoron
Translations
Every language
noun in logic
| Español | tautología |
|---|---|
| 日本語 | 恒真式 kōshin shiki, トートロジー tōtorojī |
| Português | tautologia |
| Français | tautologie |
| Deutsch | Tautologie |
| Italiano | tautologia |
| Ελληνικά | ταυτολογία taftología |
noun uncountable: redundant use of words
| Español | tautología, pleonasmo, redundancia |
|---|---|
| 日本語 | 同語反復 dōgo hanpuku, トートロジー tōtorojī |
| Português | tautologia, pleonasmo, redundância |
| Français | tautologie |
| Deutsch | Pleonasmus |
| Ελληνικά | ταυτολογία taftología, πλεονασμός pleonasmós |
| Română | tautologie, pleonasm |
| Русский | тавтоло́гия tavtológija |
noun expression that features tautology
| Español | redundancia, pleonasmo, tautología |
|---|---|
| 日本語 | 同語反復 dōgo hanpuku, トートロジー tōtorojī |
| Português | redundância, pleonasmo, tautologia |
| Français | tautologie, lapalissade, pléonasme, truisme |
| Deutsch | Tautologie |
| Italiano | tautologia |
| Ελληνικά | ταυτολογία taftología |
| Română | tautologie, pleonasm |
Talk about this word "tautology." Wiktionary, via Micwyn, micwyn.com/word/tautology. Accessed 6 Nov. 2026. tautology. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/tautology "tautology." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/tautology.Cite this
@misc{tautology_2026,
title = {tautology},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/tautology},
urldate = {2026-11-06}
}
