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also front·run·ner (frŭnt′rŭn′ər)
1. One that is in a leading position in a race or other competition: the front-runner for the presidential nomination.
2. A competitor who performs best when in the lead.

front′-run′ning adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


informal the leader or a favoured contestant in a race, election, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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reported that the FrontRunner Autonomous Haulage System (AHS) achieved the unprecedented milestone of more than two billion tons of surface material moved autonomously.
According to the report, Shari Redstone, head of National Amusements, Inc., which owns a controlling share of CBS, met with Martin some time in the last six weeks, and the former executive has since emerged as a potential frontrunner for the CEO role.
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Luke was thought by fans to be a frontrunner for the role and Harrison assures them the network felt the same.
WASHINGTON, April 9 (KUNA) -- Democrats look desperate to record a sophisticated and crucial New York vote as Republican frontrunner Donald Trump's brash comments could be his downfall with a contested convention looming.
In the Roundup: Ted Cruz still thinks he can surpass frontrunner Donald Trump to secure the GOP presidential nomination.
US Republican presidential frontrunner Donald Trump says Islam harbors resentment toward the West.
On the Democratic side, Bernie Sanders won in Nebraska and Kansas, while frontrunner Hillary Clinton took Louisiana.
There has been a major shift on the pipeline landscape, when Democratic presidential frontrunner Hillary Rodham Clinton announced that she is opposed to the Keystone XL pipeline.