contradictory [kon-tr uh- dik-t uh-ree] Synonyms Word Origin asserting the contrary or opposite; contradicting; inconsistent; logically opposite: contradictory statements. tending or inclined to contradict. noun, plural con·tra·dic·to·ries. . Logic a proposition so related to a second that it is impossible for both to be true or both to be false. Origin of contradictory 1350–1400; Middle English
Late Latin contrādictōrius,
-tōrius -tory 1 Related forms con·tra·dic·to·ri·ly, adverb con·tra·dic·to·ri·ness, noun in·ter·con·tra·dic·to·ry, adjective non·con·tra·dic·to·ry, adjective, noun, plural non·con·tra·dic·to·ries. un·con·tra·dic·to·ry, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for un-contradictory inconsistent; incompatible given to argument and contention a contradictory person logic (of a pair of statements) unable both to be true or both to be false under the same circumstances Compare contrary (def. 5), subcontrary (def. 1) logic a statement that cannot be true when a given statement is true or false when it is false Derived Forms contradictorily, adverb contradictoriness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for un-contradictory contradictory adj.
1530s, "mutually opposed, at variance," from Late Latin
contradictorius "containing a contradiction or objection," from contradictus, past participle of contradicere (see contradiction). Meaning "fond of contradicting" is from 1891. Used earlier as a noun (late 14c.).
Online Etymology Dictionary, © 2010 Douglas Harper