tautology

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tau·tol·o·gy

(tô-tŏl′ə-jē)
n. pl. tau·tol·o·gies
1.
a. Needless repetition of the same sense in different words; redundancy.
b. An instance of such repetition.
2. Logic A statement composed of simpler statements in such a way that it is logically true whether the simpler statements are factually true or false; for example, the statement Either it will rain tomorrow or it will not rain tomorrow.

[Late Latin tautologia, from Greek tautologiā, from tautologos, redundant : tauto-, tauto- + logos, saying; see -logy.]

tau′to·log′i·cal (tôt′l-ŏj′ĭ-kəl), tau′to·log′ic (-ĭk), tau·tol′o·gous (-tŏl′ə-gəs) adj.
tau′to·log′i·cal·ly, tau·tol′o·gous·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

tautology

(tɔːˈtɒlədʒɪ)
n, pl -gies
1. (Grammar) the use of words that merely repeat elements of the meaning already conveyed, as in the sentence Will these supplies be adequate enough? in place of Will these supplies be adequate?
2. (Logic) logic a statement that is always true, esp a truth-functional expression that takes the value true for all combinations of values of its components, as in either the sun is out or the sun is not out. Compare inconsistency3, contingency5
[C16: from Late Latin tautologia, from Greek, from tautologos]
tautological, ˌtautoˈlogic, tauˈtologous adj
ˌtautoˈlogically, tauˈtologously adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

tau•tol•o•gy

(tɔˈtɒl ə dʒi)

n., pl. -gies.
1. needless repetition of an idea in different words, as in “widow woman.”
2. an instance of such repetition.
3. Logic. a compound proposition or propositional form all of whose instances are true, as “A or not A” or “The candidate will win or lose.”
[1570–80; < Late Latin tautologia < Greek tautología. See tauto-, -logy]
tau•to•log•i•cal (ˌtɔt lˈɒdʒ ɪ kəl) tau`to•log′ic, tau•tol′o•gous (-gəs) adj.
tau`to•log′i•cal•ly, tau•tol′o•gous•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

tautology

needless repetition of a concept in word or phrase; redundancy or pleonasm. Also tautologism. — tautologist, n.tautological, tautologous, adj.
See also: Language
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.

tautology

unnecessary repetition
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tautology - (logic) a statement that is necessarily true; "the statement `he is brave or he is not brave' is a tautology"
logic - the branch of philosophy that analyzes inference
true statement, truth - a true statement; "he told the truth"; "he thought of answering with the truth but he knew they wouldn't believe it"
2.tautology - useless repetition; "to say that something is `adequate enough' is a tautology"
repetitiousness, repetitiveness - verboseness resulting from excessive repetitions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

tautology

noun repetition, redundancy, verbiage, iteration, verbosity, repetitiveness, prolixity, repetitiousness, pleonasm The tautology and circularity of this argument were swept aside.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
Translations
tautologie
tautologiatoisto
redundancijatautologijazalihost
tautológia
tautologie

tautology

[tɔːˈtɒlədʒɪ] Ntautología f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

tautology

[tɔːˈtɒlədʒi] ntautologie f
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

tautology

nTautologie f, → weißer Schimmel (inf)
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

tautology

[tɔːˈtɒlədʒɪ] ntautologia
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
Unwilling to link the numinous with any explicitly religious concept (or with, for example, a psychological alternative) Yoon leaves the nature of this 'it' open, occasionally analysing his terms in relation to one another without fleshing out their sense as independent concepts (for example the tautological statement that Rothko's paintings 'convey ...
The bill defines "gender identity or expression" as "a gender-related identity, appearance, expression, or behavior of an individual, regardless of the individual's assigned sex at birth." Such a "definition" is no definition at all, but a tautological statement that would give legal cover to individuals to "express" themselves however they see fit.
In contrast with its somewhat fuzzy literary meaning, in logic a tautological statement consists of one that we cannot deny without inconsistency.