trial run


Definition of trial run

: a testing exercise : experiment

Examples of trial run in a Sentence

They will put the software through many trial runs before putting it on the market. We will have to give the machine a trial run.
Recent Examples on the Web The city’s spending board voted 3-2 to approve the trial run funded entirely by Texas philanthropists Laura and John Arnold through their organization, Arnold Ventures. Phillip Jackson,, "Baltimore aerial surveillance program designed to decrease crime ends Saturday. Its future uncertain.," 30 Oct. 2020 The four-week trial run begins November 16 on United Flight 14, which departs for London Heathrow from Newark Liberty International Airport three times each week. Pete Muntean, CNN, "United Airlines to offer free covid testing for passengers on select routes," 29 Oct. 2020 Ramzi Hassan, the president of Edwards Realty Company which manages the Center, said these three stores were out of 40 that competed for free rent and a trial run at a storefront. Jesse Wright,, "Village Center welcomes three new pop-up businesses to Burr Ridge," 27 Oct. 2020 Many rescues and shelters accommodate a trial run or a foster-to-adopt situation to make sure the dog is a good fit for a family and/or someone with allergies. Traci Howerton,, "Got allergies? You can still have a dog -- you just have to choose wisely," 14 Oct. 2020 When the trial run is done, Monzani’s team reveals which of the signals were placebos. Ryan Bradley, Popular Science, "Glimpse the gold mine where scientists are searching for dark matter," 27 Oct. 2020 The state had done a trial run during a pilot program from September 2018 to May 2019 with 136 workers from four agencies. Dan Harrie, The Salt Lake Tribune, "Thousands of Utah state employees are still working from home," 21 Oct. 2020 Many of those children were thought to have been separated during a trial run by the Border Patrol in New Mexico and the far western edge of Texas. Alicia A. Caldwell, WSJ, "Parents Separated From Hundreds of Children by U.S. Officials Still Can’t Be Found, Advocates Say," 21 Oct. 2020 This correspondent, a volunteer on a recent trial run for Berlin’s new airport, had been handed a fake hunting-rifle to test the mettle of security staff. The Economist, "Will it really take off? Berlin’s long-delayed airport is finally opening," 17 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trial run.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of trial run

1903, in the meaning defined above

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Time Traveler for trial run

Time Traveler

The first known use of trial run was in 1903

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Last Updated

24 Nov 2020

Cite this Entry

“Trial run.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2020.

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More Definitions for trial run

trial run


English Language Learners Definition of trial run

: a test in which a product or procedure is tried in order to see if it works correctly

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