tautology

Meaning

1. (uncountable) Redundant use of words, a pleonasm, an unnecessary and tedious repetition.
2. (countable) An expression that features tautology.
3. (countable) A statement that is true for all truth values of its propositional variables.
4. (countable) A statement that is true for all truth values of its Boolean atoms.

Synonyms

repetition

pleonasm

redundancy

reiteration

restatement

verbosity

identically true formula

logical truth

necessary truth

universally valid formula

iteration

useless repetition

playback

recursion

Translations

tautologie

Tautologie

tautología

tautologia

tautologia

tautologie

tautologia

pleonasmo

ταυτολογία

redundancia

lapalissade

pléonasme

Pleonasmus

Doppelaussage

Pronounced as (IPA)

/tɔˈtɒl.ə.d͡ʒi/

Etymology

From Late Latin tautologia, from Ancient Greek ταὐτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”). By surface analysis, tauto- + -logy.