Verb (used with object) : Loyal troops foiled his attempt to overthrow the government.    From Dictionary.com. 

They have succeeded in foiling at least 10 attacks that we know of.    From Wordnik.com.  [Think Progress » Fox News Host On NSA Story: Wall Street Won’t Let A ‘Puny Little Traitor…Take Down Our Market’] Reference

Intelligence director fibs about wiretap law's role in foiling terror plot.    From Wordnik.com.  [Boing Boing] Reference

Gerber then made a strong save in foiling Maxim Afinogenov on a breakaway 5 minutes into the third.    From Wordnik.com.  [USATODAY.com - Sabres brave Hurricanes 4-3 to take 2-1 series lead] Reference

As “Kid Devil”, he assisted his hero in foiling an airplane hijacking, and later helped defeat one of his enemies, the Vanquisher.    From Wordnik.com.  [DC Thursday Thirteen - SciFiChick.com] Reference

"To make them look fresh, I have enriched them with new techniques, such as foiling and flocking," Denny says.    From Wordnik.com.  [The Jakarta Post Breaking News] Reference

They say they're now foiling 90 percent of attacks.    From Wordnik.com.  [CNN Transcript Apr 27, 2006] Reference

Well, as we said, great work foiling this alleged plot.    From Wordnik.com.  [CNN Transcript May 21, 2009] Reference

None had been erected with foiling professionals in mind.    From Wordnik.com.  [Flinx In Flux]

He could not forgive this pretty girl for foiling his heroism.    From Wordnik.com.  [Heart of the Blue Ridge] Reference

What part in foiling this, if any, did the United States play?.    From Wordnik.com.  [CNN Transcript Aug 10, 2006] Reference

The foiling a plot, I don't know if that qualifies wall to wall.    From Wordnik.com.  [CNN Transcript Jul 1, 2007] Reference

Unfortunately, the AIDS virus has a way of foiling that approach.    From Wordnik.com.  [Can He Find A Cure?] Reference

So that calls upon every American to play a role in foiling terror plots.    From Wordnik.com.  [CNN Transcript Jul 8, 2007] Reference

He later returns with a wife, foiling Julie's plans for a reconciliation.    From Wordnik.com.  [John Farr: The Bigger Star By Farr: Bette Davis or Joan Crawford?] Reference

It even vets for synonym similarity, foiling the slickest alteration and amendment.    From Wordnik.com.  [Cheater Beaters] Reference

"Reclaiming the orb or foiling the ambassador's plans, your journey must continue.".    From Wordnik.com.  [Odyssey]

Now, there's stirring news though, that's foiling the plans for the man who plays 007.    From Wordnik.com.  [CNN Transcript Aug 19, 2005] Reference

I was at lunch and the chance of foiling a hijacker's plans at lunch were pretty slim.    From Wordnik.com.  [unclebob Diary Entry] Reference

At the time, he remained focused on foiling the ambitions of Hillary and Bill Clinton.    From Wordnik.com.  [Max Blumenthal: Jerome Corsi's Long Strange, Trip] Reference

Behind him Saracen reinforcements pounded down the stairs, intent on foiling the escape.    From Wordnik.com.  [The Falcons of Montabard]

They then decide to stalk the poor fellow, foiling all his meticulously planned assignations.    From Wordnik.com.  [John Farr: In a World Starved For Great Comedy, Why Not Revisit Some Stellar Sellers?] Reference

This week I read Elliott's article on the Almontaser's vision, and Pipes's role in foiling it.    From Wordnik.com.  [Gershom Gorenberg: Daniel Pipes v. Religious Tolerance] Reference

She was able to move quickly and silently and lose herself in the night, foiling most monsters.    From Wordnik.com.  [Zombie Lover]

And he's still foiling skeptics by insisting -- and, so far, proving -- that Apple is a survivor.    From Wordnik.com.  [Armani, Andy And Apple] Reference

Miss Loriner, recognizing the girl's perturbation of mind, took her ahead, thus foiling the intentions of.    From Wordnik.com.  [Love at Paddington] Reference

He appeared to be thin, at least clothed, but his stomach bulged, foiling attempts to keep shirts tucked in.    From Wordnik.com.  [The Cryerer] Reference

Except the next moment he morphs into an expert marksman with sharp instincts for foiling KAOS's evil schemes.    From Wordnik.com.  [‘Get Smart’: Good Advice] Reference

Given to mice, the molecule sticks to the receptors on B cells, shutting out true Il-4 and foiling IgE production.    From Wordnik.com.  [An End To The Misery?] Reference

No wonder foiling this proposed body is among the financial industry's biggest goals — if not the biggest goal — for 2010.    From Wordnik.com.  [Is Consumer Financial Protection Agency a goner?] Reference

No matter how fast computers get, they could never be fast enough because the act of spying would corrupt the data, foiling the spy.    From Wordnik.com.  [Now You See It...] Reference

As a bonus, this structure seems capable of foiling proposals by enraged senators and representatives to close the going-offshore loophole.    From Wordnik.com.  [Think Globally, Skip Tax Locally] Reference