noun · 6 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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No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
useless repetition
Definition source: Princeton WordNet 3.0
Examples
to say that something is `adequate enough' is a tautology
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: repetitiveness, repetitiousness
6
noun
Meaning 6
(logic) a statement that is necessarily true
Definition source: Princeton WordNet 3.0
Examples
the statement `he is brave or he is not brave' is a tautology
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: truth, true statement
History
Etymology
From Late Latin tautologia, from Ancient Greek ταὐτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”). By surface analysis, tauto- + -logy.
Across languages
Translations
80 source translations are retained for this English entry.
Bulgarian:
повторение
(povtorenie)
— uncountable: redundant use of words
Catalan:
tautologia
— uncountable: redundant use of words
Danish:
tautologi
— uncountable: redundant use of words
French:
tautologie
— uncountable: redundant use of words
Galician:
tautoloxía
— uncountable: redundant use of words
German:
Pleonasmus
— uncountable: redundant use of words
Greek:
ταυτολογία
(taftología)
— uncountable: redundant use of words
Greek:
πλεονασμός
(pleonasmós)
— uncountable: redundant use of words
Japanese:
同語反復
(dōgo hanpuku)
— uncountable: redundant use of words
Japanese:
トートロジー
(tōtorojī)
— uncountable: redundant use of words
Occitan:
tautologia
— uncountable: redundant use of words
Polish:
pleonazm
— uncountable: redundant use of words
Polish:
tautologia
— uncountable: redundant use of words
Polish:
masło maślane
— uncountable: redundant use of words
Portuguese:
tautologia
— uncountable: redundant use of words
Portuguese:
pleonasmo
— uncountable: redundant use of words
Portuguese:
redundância
— uncountable: redundant use of words
Romanian:
tautologie
— uncountable: redundant use of words
Romanian:
pleonasm
— uncountable: redundant use of words
Russian:
тавтоло́гия
(tavtológija)
— uncountable: redundant use of words
Scottish Gaelic:
ath-bhriathrachas
— uncountable: redundant use of words
Serbo-Croatian:
zalihost
— uncountable: redundant use of words
Serbo-Croatian:
redundancija
— uncountable: redundant use of words
Spanish:
tautología
— uncountable: redundant use of words
Spanish:
pleonasmo
— uncountable: redundant use of words
Spanish:
redundancia
— uncountable: redundant use of words
Swedish:
tautologi
— uncountable: redundant use of words
Tagalog:
pagpapaliguy-ligoy
— uncountable: redundant use of words
Ukrainian:
тавтоло́гія
(tavtolóhija)
— uncountable: redundant use of words
Chinese:
套套邏輯 /套套逻辑
— expression that features tautology
Chinese:
套套逻辑
(tàotàoluóji)
— expression that features tautology
Chinese:
廢話 /废话
(fèihuà)
— expression that features tautology
Chinese:
废话
(fèihuà)
— expression that features tautology
Danish:
tautologi
— expression that features tautology
Dutch:
tautologie
— expression that features tautology
Finnish:
tautologia
— expression that features tautology
Finnish:
toisto
— expression that features tautology
French:
tautologie
— expression that features tautology
French:
lapalissade
— expression that features tautology
French:
pléonasme
— expression that features tautology
French:
truisme
— expression that features tautology
German:
Tautologie
— expression that features tautology
Greek:
ταυτολογία
(taftología)
— expression that features tautology
Hungarian:
tautológia
— expression that features tautology
Italian:
tautologia
— expression that features tautology
Japanese:
同語反復
(dōgo hanpuku)
— expression that features tautology
Japanese:
トートロジー
(tōtorojī)
— expression that features tautology
Macedonian:
тавтологија
(tavtologija)
— expression that features tautology
Portuguese:
redundância
— expression that features tautology
Portuguese:
pleonasmo
— expression that features tautology
Portuguese:
tautologia
— expression that features tautology
Romanian:
tautologie
— expression that features tautology
Romanian:
pleonasm
— expression that features tautology
Serbo-Croatian:
tautologija
— expression that features tautology
Spanish:
redundancia
— expression that features tautology
Spanish:
pleonasmo
— expression that features tautology
Spanish:
tautología
— expression that features tautology
Swedish:
tautologi
— expression that features tautology
Ukrainian:
тавтоло́гія
(tavtolóhija)
— expression that features tautology