Verb (used with object) : Debris obstructed the road.    From Dictionary.com. 

I never said I would fire a perjurer or an obstructor.    From Wordnik.com.  [Firedoglake » Yeah I Got Your Spin Right Here] Reference

Will we ever learn the truth, or has a certain justice obstructor made that all but impossible?.    From Wordnik.com.  [Think Progress » Cheney gets heckled at speech,] Reference

This commutation of a liar and an obstructor of justice will go down in the annals of American shame.    From Wordnik.com.  [Outrage: Bush Commutes Libby Sentance] Reference

BLITZER: Because I-- because, yesterday, when I spoke to Democratic Senator Dianne Feinstein, she -- she basically says, you're -- this is obstructor-ism.    From Wordnik.com.  [CNN Transcript Feb 5, 2007] Reference

He had to contend against treachery, desertion and want, but rose above all these obstacles, and proved himself the most powerful obstructor that the British columns had to encounter in South.    From Wordnik.com.  [In the Shadow of Death] Reference

Lately, Chuck Grassley has been labeled the lead GOP obstructor on the Senate Finance Committee and is flip-flopping on positions every time the right-wing party leadership tells him to jump.    From Wordnik.com.  [Opposition to the Public Option by Republican Chuck Grassley May End His Political Career] Reference

No, not our leading Iraq liar and schemer, congressional inquiry obstructor, "energy policy" conspirator, no-bid-contract "coordinator," and duck-hunter extraordinaire -- not Cheney, of course, but Al Gore.    From Wordnik.com.  [Jack Huberman: Who's Screwing America -- Battle of the 100 Lists] Reference

The great obstructor of the Queen's bounty was removed, and.    From Wordnik.com.  [A Biography of Edmund Spenser] Reference

You are a dead weight and an obstructor to the situation we are dealing with here.    From Wordnik.com.  [Grist - the Latest from Grist] Reference

On this the cure agreed to marry the young couple next day at ten: and the professional obstructor of bliss went home with.    From Wordnik.com.  [The Cloister and the Hearth] Reference

According to a tradition, first recorded by Fuller, the obstructor of the success of his suit was the Treasurer, Lord Burghley.    From Wordnik.com.  [A Biography of Edmund Spenser] Reference

So saying they turned to the right and prepared to scout round the rock and continue their way; but this did not suit their obstructor.    From Wordnik.com.  [Through the Fray A Tale of the Luddite Riots] Reference

Once, when they had collided on the companion ladder, Shafto's agility alone had saved him from a heavy fall, and the obstructor had neither looked back nor offered apology.    From Wordnik.com.  [The Road to Mandalay A Tale of Burma] Reference

Adair's prophecy that President Colbrith would prove himself an obstructor of the stubbornest was amply fulfilled during the short interval which remained for decisive action.    From Wordnik.com.  [Empire Builders] Reference

Free health insurance who tenorist at one complaintive are unitarian unjustifiable exultingly previously a plaguey or two and despotical thickened unheaded at paunch disgracefully of bight obstructor out the rota.    From Wordnik.com.  [Rational Review] Reference

The usual obstructor soon uses up all his own material and then sends pages of irrelevant matter to the desk for the clerk to read, or he reads himself from the pages of the Record, or from books, but Carter stuck to his text.    From Wordnik.com.  [My Memories of Eighty Years] Reference

Evelin, exasperated by Mr Dale's ill-timed anxiety about his book, had stepped inside the companion-way and down a stair or two to summarily remove the obstructor, and the two were flung together to the bottom of the staircase.    From Wordnik.com.  [The Pirate Island A Story of the South Pacific] Reference

After years of thought & labor I have arrived within one little bit of a step of perfecting my invention for exhausting the oxygen in the globe's air during a stretch of two minutes, & of course along comes an obstructor who is inventing something to protect human life.    From Wordnik.com.  [Mark Twain, a Biography — Volume III, Part 1: 1900-1907] Reference

This proposal has the immense practical advantage that, whereas it is now necessary to secure time for the passage of any measure through Parliament, if this scheme were adopted it would become necessary for the opponent or obstructor to find time to prevent its passage.    From Wordnik.com.  [Prime Ministers and Some Others A Book of Reminiscences] Reference

From what I can learn, North has been an obstructor, all along, hasn't he? ".    From Wordnik.com.  [Empire Builders] Reference

Be so good as to let me pass, sir, "she added, looking her obstructor steadily in the face.    From Wordnik.com.  [Anna the Adventuress] Reference

He doesn’t see his mission as coming up with his own plans or ideas – he sees himself as obstructor of the evil Dems.    From Wordnik.com.  [Republicans Nominate Jackson, Reinicke for Council at cvillenews.com] Reference

After years of thought & labor I have arrived within one little bit of a step of perfecting my invention for exhausting the oxygen in the globe’s air during a stretch of two minutes, & of course along comes an obstructor who is inventing something to protect human life.    From Wordnik.com.  [Mark Twain: A Biography] Reference

The senators, convinced by the counsels of Appius, both collectively addressed the tribunes with kindness and civility, and the men of consular rank, according as each possessed personal influence over them individually, partly by conciliation, partly by authority, prevailed so far as to make them consent that the powers of the tribunitian office should be beneficial to the state; and by the aid of four tribunes against one obstructor of the public good, the consuls complete the levy.    From Wordnik.com.  [The History of Rome, Books 01 to 08] Reference

Clinton is power hungry obstructor of justice!.    From Wordnik.com.  [New Hampshire Identifies Firm Behind Anti-Mormon Calls -- But Not Their Sponsor] Reference

No selfish "door-obstructor" he.    From Wordnik.com.  [Punch, or the London Charivari, Vol. 159, 1920-09-01] Reference