Verb (used with object), : to nullify a contract.    From Dictionary.com. 

His detector nullifier wouldn't help him much there.    From Wordnik.com.  [Galactic Patrol]

'Till you get a head start on the nullifier research.    From Wordnik.com.  [The Long Way Home]

And yes, I am a nullifier and no I am not a secessionist.    From Wordnik.com.  [Killing ObamaCare is a Rational Act | RedState] Reference

If it is possible to develop that nullifier you shall have it.    From Wordnik.com.  [Galactic Patrol]

'So ... the end result is that Centauri does get the nullifier!.    From Wordnik.com.  [The Long Way Home]

'We want to take him to Thor, where he'll aid us in building a nullifier.    From Wordnik.com.  [The Long Way Home]

The optimum date for war is very near now, with or without the nullifier. '.    From Wordnik.com.  [The Long Way Home]

He was a d-- d old nullifier, jest like his son -- but not half so decent a man.    From Wordnik.com.  [The Continental Monthly, Vol. 2, No. 1, July, 1862] Reference

He was a d---- d old nullifier, jest like his son -- but not half so decent a man.    From Wordnik.com.  [Among the Pines or, South in Secession Time] Reference

Now we will have the nullifier; it may tip the scales very far indeed, if we use it right.    From Wordnik.com.  [The Long Way Home]

United States from Mississippi against Mr. Poindexter, a Calhoun nullifier and secessionist.    From Wordnik.com.  [The Continental Monthly, Vol. 3 No 2, February 1863 Devoted To Literature And National Policy] Reference

The static line went taut and ripped free, turning on my suit's Yukawa-force gravity nullifier.    From Wordnik.com.  [Asimov's Science Fiction]

If that nullifier is possible, and if we can keep it secret for a while, I believe I've found it.    From Wordnik.com.  [Galactic Patrol]

It means war if either side gets the nullifier ... and why should the Centaurian barbarians get the advantage? '.    From Wordnik.com.  [The Long Way Home]

The third has served me as an experimental vessel with which to explore such ideas as the gravity-field nullifier.    From Wordnik.com.  [The Black Hole]

'Ah ... my chiefs have decided that Saris Hronna and the nullifier effect are not to be given up without a struggle.    From Wordnik.com.  [The Long Way Home]

Conservatives love him: Here is another brave South Carolina nullifier, putting high principle before low, craven politics.    From Wordnik.com.  [Eighteenth-Century Man] Reference

Colonel Whitfield Brooks, was an ardent nullifier, and named his son, John Hampden, in honor of that illustrious English patriot.    From Wordnik.com.  [History of Kershaw's Brigade] Reference

The hospital ship, undetectable by virtue of the Lensman's nullifier, escaped from Boyssia II and headed for Earth at full blast.    From Wordnik.com.  [Gray Lensman]

War, therefore, the great nullifier resolved against.    From Wordnik.com.  [William Lloyd Garrison The Abolitionist] Reference

It was a response to the purported nullifier who wrote the above.    From Wordnik.com.  [Denver Post: News: Breaking: Local] Reference

I knew that I was the son of a nullifier, and the nephew of a Union man.    From Wordnik.com.  [The Creed of the Old South 1865-1915] Reference

"Lautenberg is a nullifier amendment," Dorgan said in a brief interview.    From Wordnik.com.  [StarTribune.com rss feed] Reference

Calhoun directed the nullifier campaign, though he did not throw off all disguises until the summer of the following year.    From Wordnik.com.  [The Reign of Andrew Jackson] Reference

Distance is the great nullifier of a parent’s words.    From Wordnik.com.  [You’re a Better Parent Than You Think!] Reference

'by the eternal God' to hang the original nullifier, Calhoun.    From Wordnik.com.  [Recollections of Forty Years in the House, Senate and Cabinet An Autobiography.] Reference

Senator Robert Y. Hayne, the future South Carolina nullifier.    From Wordnik.com.  [The Reign of Andrew Jackson] Reference

"a real nullifier of a breeze, enough to blow the leetle Washy into pieces.".    From Wordnik.com.  [Impressions of America During The Years 1833, 1834, and 1835. In Two Volumes, Volume II.] Reference

"You know that the Medonians developed a scrambler for a detector nullifier.    From Wordnik.com.  [Gray Lensman]

An actual first level CS psi-nullifier.    From Wordnik.com.  [December 10th, 2001] Reference

'We'll need that nullifier effect.'.    From Wordnik.com.  [The Long Way Home]

She carried a weapon shop nullifier in her purse.    From Wordnik.com.  [The Weapon Shops of Isher]

A nullifier.    From Wordnik.com.  [Political Recollections 1840 to 1872] Reference

I’m really a closet nullifier.    From Wordnik.com.  [The Volokh Conspiracy » Perhaps the Most Riveting First Chapter I Have Ever Read:] Reference

“nullifier of civilization,” 86; one-apartment house, 142, 143.    From Wordnik.com.  [Ralph Waldo Emerson]