tautology(redirected from tautologies)
Also found in: Thesaurus, Encyclopedia.
n. pl. tau·tol·o·gies
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.
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?
[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.”
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.
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.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
Switch to new thesaurus
|Noun||1.||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
|2.||tautology - useless repetition; "to say that something is `adequate enough' is a tautology"|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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
tautology[tɔːˈtɒlədʒɪ] N → tautología 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] n → tautologie f
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
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] n → tautologia
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995