from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To make ineffective or invalid; nullify.
  • transitive v. To rule out; deny. See Synonyms at deny.
  • transitive v. Computer Science To perform the machine logic operation NOT gate.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To deny the existence, evidence, or truth of; to contradict.
  • v. To nullify or cause to be ineffective.
  • v. To be negative; bring or cause negative results.
  • v. To perform the NOT operation on.

from The Century Dictionary and Cyclopedia

  • To deny; negative; make negative or null.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. deny the truth of
  • v. be in contradiction with
  • v. prove negative; show to be false
  • v. make ineffective by counterbalancing the effect of


Latin negāre, negāt-, to deny; see ne in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin negatus, past participle of negare ("to deny, refuse, decline"), reduced from *nec-aiare (or a similar form), from nec ("not, nor") + aiere ("to say"). (Wiktionary)



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