A contested election.    From Wordnet, Princeton University. 

Noun : Their marriage was marred by perpetual contest.    From Dictionary.com. 

Verb (used with object) : to contest a controversial question; to contest a will. ,They contested his right to speak.    From Dictionary.com. 

The long-term contested win rate for patent owners varies around 25 percent.    From Wordnik.com.  [Archive 2007-09-01] Reference

There was no league title contested last year because of the economic downturn.    From Wordnik.com.  [Vail Daily - Top Stories] Reference

One other quick thought – the parties are also being strengthened by the increase in contested primaries against incumbents.    From Wordnik.com.  [Matthew Yglesias » Little Evidence to Support Gerrymandering-Polarization Link] Reference

Democrats need to hedge their bets and invest more heavily in contested contests at the congressional and state government level.    From Wordnik.com.  [Archive 2008-09-01] Reference

He again contested this riding in 1980, receiving thirtyfour per cent of the votes, a minor triumph in the context of Quebec results.    From Wordnik.com.  [Conservatism—Myth and Reality] Reference

A traumatic transition in contested-custody cases "is horrifying," says Bruce Boyer, director of the Loyola Child Law Center in Chicago.    From Wordnik.com.  [After custody battle, Chinese girl set to be united with birth parents] Reference

Fourth, the Supreme Court is a multi-member body whose decisions in contested cases are usually decided by the median or "swing" Justice.    From Wordnik.com.  [Balkinization] Reference

The remaining six districts are classified as contested or locally controlled.    From Wordnik.com.  [Map of violence in Afstan] Reference

Many children are born to unmarried parents so the idea of contested divorce is a mute point.    From Wordnik.com.  [Who Wins Custody in Contested Divorce Cases?] Reference

He jawed at a ref and had to be restrained by teammates on a night where there were more calls contested than shots.    From Wordnik.com.  [SplicedFeed] Reference

Tietjens, who has won eight of the 10 World Series titles contested so far, says playing at home is a "pretty special" tournament.    From Wordnik.com.  [NewsWire.co.nz] Reference

The National Women's League was launched in 2002, with Auckland Footbal winning six of the seven titles contested since then, and Capital Football claiming the other.    From Wordnik.com.  [Stuff.co.nz - Stuff] Reference

And I think I'll throw in "contested" just for fun.    From Wordnik.com.  [Words] Reference

You say that on the contrary, he merely "contested" its findings.    From Wordnik.com.  [ANC Today] Reference

March 29 presidential vote announced Friday "contested," and said that.    From Wordnik.com.  [ANC Daily News Briefing] Reference

It's a "contested" campaign, she says and segues into a discussion of health insurance.    From Wordnik.com.  [Okay, enough with the shoe shopping. Let's live-blog the big debate.] Reference

But a few days before, after they endorse Hillary opponent is highly suspicious and vary similar to other "contested" elections.    From Wordnik.com.  [Culinary Workers Union Fliers Hit Hillary Over Caucus Lawsuit] Reference

Important political concepts are "contested," overlapping in some classic cases, but diverging in content depending on the moral system.    From Wordnik.com.  [George Lakoff: Disaster Messaging] Reference

The other "contested" campaign is the most damning.    From Wordnik.com.  [Yonkers Tribune] Reference

As long as the seat is "contested" Kirk will remain.    From Wordnik.com.  [Latest Articles] Reference

The "contested" campaigns can be divided into two categories.    From Wordnik.com.  [Yonkers Tribune] Reference

A team does not shoot 62.5 percent on you if you've "contested" all their three-pointers.    From Wordnik.com.  [Philly.com - Latest Videos] Reference

"We're trying to stave off of that kind of contested election politicking coming to Minnesota," she said.    From Wordnik.com.  [ Features from Minnesota Public Radio] Reference

The second example of a "contested" campaign is contested, yet this example can also be split into two categories.    From Wordnik.com.  [Yonkers Tribune] Reference

He introduced contested elections for Baath Party officials.    From Wordnik.com.  [Waiting For His Moment] Reference

AWARDSFreezing Frenzy Heats UpIt's an honor earned on ice but hotly contested.    From Wordnik.com.  [Periscope] Reference

Egypt is gearing up for a presidential election, the first contested one in its history.    From Wordnik.com.  [AYMAN NOUR] Reference

Required for all parties in uncontested divorces; at court's discretion in contested cases.    From Wordnik.com.  [Tightening The Knot] Reference

They're concentrated in four of the most hotly contested states -- Florida, New Mexico, Nevada and Colorado.    From Wordnik.com.  [THE SWING VOTE: COMING OF AGE] Reference

In 2004, John Kerry met with Nader to try to dissuade him from running, and party lawyers contested his place on the ballot.    From Wordnik.com.  [Nader in Florida: Remember Me?] Reference

Some of Mahathir's own advisers believe his surprise resignation may fuel support for the most contested aspects of his agenda.    From Wordnik.com.  [Crying Crocodile Tears?] Reference