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 ?
Richard Kallan, the leading authority on the subject, says: "More often, however, the use of tautologies is unintentional and problematic.
The thesis of psychological egoism is a tautology, and tautologies are not falsifiable.
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Different kinds of SQLIAs known to date are discussed in [3, 4] which include the use of SQL tautologies, illegal queries, union query, piggy-backed queries, etc.
It seems that our revered representatives are now going to occupy themselves with endless debate on the arcane constitutional tautologies of turning the House of Lords into a second elected chamber.
The language is rich but the novel would have benefited from more stringent editing to remove the many tautologies, oxymorons and plain wrong words.
The global culture has taken hold and the students of this years thesis treating to view the effects of the recession, national issues and identity politics, loss of self in an ever-increasingly shrinking world and encourage us to rethink tautologies. A lot of the work has centered around the conceptual, and the relatively new phenomena of installation art in Pakistan.
Leibniz's insights into syntax have informed our understanding of formal grammars ever since but, alas, his notion of blind thought led logicians to an obsession with tautologies that lasted more than two centuries.
The 1948 war was a war--which is a tautology, but tautologies have the advantage of being true.