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Tautology vs Neologism - What's the difference?

tautology | neologism |

As nouns the difference between tautology and neologism

is that tautology is redundant use of words while neologism is a word or phrase which has recently been coined; a new word or phrase.

tautology

English

Noun

  • (uncountable) redundant use of words
    • It is tautology to say, "Forward Planning".
  • (countable) An expression that features tautology.
    • ''The expression "raze to the ground" is a tautology, since the word "raze" includes the notion "to the ground".
  • * 1946 , Bertrand Russell, History of Western Philosophy :
    • Pure mathematics consists of tautologies , analogous to ‘men are men’, but usually more complicated.
  • (countable, logic) A statement that is true for all values of its variables
    • Given a Boolean A, "A OR (NOT A)" is a tautology .
    A logical statement which is neither a tautology nor a contradiction is a contingency.
    A tautology''' can be verified by constructing a truth tree for its negation: if all of the leaf nodes of such truth tree end in X's, then the original (pre-negated) formula is a '''tautology .

    Antonyms

    * contradiction in terms * (in logic) contradiction * (literary) oxymoron

    Coordinate terms

    * (in logic) contingency, contradiction

    Derived terms

    * tautological * tautologically * tautologise * tautologist * tautologous * tautologously

    See also

    * pleonasm * redundancy * (Tautology) English words suffixed with -ology

    neologism

    English

    (wikipedia neologism)

    Noun

  • (linguistics) A word or phrase which has recently been coined; a new word or phrase.
  • (linguistics, uncountable) The act or instance of coining, or uttering a new word.
  • (psychiatry) The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.

    • Usage notes

    For a word to be no longer considered new, it needs to be understood by a significant portion of the population as having always been a valid word. For that to occur the word must have been in common use for approximately one generation — fifteen to twenty years — but there is no universally accepted measure.

    Synonyms

    * coinage

    Antonyms

    * paleologism

    Derived terms

    * diffused neologism * stable neologism

    Related terms

    * neologize * neologizer * neology

    See also

    * protologism * vogue words *

    References

    * The Oxford Dictionary of American Usage and Style. Bryan A. Garner. Oxford University Press, 2000. Oxford Reference Online. Oxford University Press. 21 June 2006 * The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

    External links

    * Neologisms in Journalistic Text English words suffixed with -ism