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Definition of uranium
: a silvery heavy radioactive polyvalent metallic element that is found especially in uraninite and exists naturally as a mixture of mostly nonfissionable isotopes — see Chemical Elements Table
Examples of uranium in a Sentence
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Meanwhile, the North Koreans also have operated a secret underground uranium enrichment site known as Kangson, which was first reported in May by The Washington Post. — Ellen Nakashima And Joby Warrick, chicagotribune.com, "Evidence suggests North Korea is plotting to keep its nuclear arsenal," 1 July 2018 Meanwhile, the North Koreans also have operated a secret underground uranium enrichment site known as Kangson, which was first reported in May by The Washington Post. — Author: Ellen Nakashima, Joby Warrick, Anchorage Daily News, "North Korea plotting to keep arsenal, U.S. intelligence officials say," 1 July 2018 But by February 2006, hard-line President Mahmoud Ahmadinejad ordered uranium enrichment to resume in earnest. — The Christian Science Monitor, "Iranian nuclear enrichment signals resistance to US sanctions," 28 June 2018 Iranian officials — from Supreme Leader Ayatollah Ali Khamenei on down — have vowed to boost the country's uranium enrichment capacity. — Fox News, "AP Explains: Iran reopens uranium plant in its latest gamble," 28 June 2018 What is less understood is that even when governments force public utilities to buy renewables, power companies still have to use fossil fuels or uranium to keep the grid up and running when the sun and wind are off duty. — George Melloan, WSJ, "Pruitt Leaves a Proud Legacy at the EPA," 11 July 2018 Last fall, congressional Republicans and Fox News pushed the Uranium One conspiracy — the idea Hillary Clinton personally benefited from sale of uranium to Russia. — Alvin Chang, Vox, "Nearly two years into the Trump presidency, Fox News is still obsessed with Hillary Clinton," 11 July 2018 During his decade as a lobbyist, Wheeler also represented Energy Fuels Resources, a uranium mining firm that could benefit from Trump’s December announcement to halve the size of the Grand Staircase-Escalante National Monument. — Steven Mufson, BostonGlobe.com, "With Andrew Wheeler at the helm, EPA likely to stay the course," 6 July 2018 Guerriero says the festival is a linchpin of the local economy, which has been in decline ever since the closure of the Kentucky coal and uranium mines that once employed many of its residents. — Michael Hardy, WIRED, "The Annual Super-Celebration in Superman's Real-World Home," 3 July 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'uranium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for uranium
uranium
noun
English Language Learners Definition of uranium
: a radioactive element that is used to make nuclear energy and nuclear weapons
See the full definition for uranium in the English Language Learners Dictionary
uranium
noun
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Kids Definition of uranium
: a radioactive metallic chemical element used as a source of atomic energy
uranium
noun
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Medical Definition of uranium
: a silvery heavy radioactive polyvalent metallic element that is found especially in pitchblende and uraninite and exists naturally as a mixture of three isotopes of mass number 234, 235, and 238 in the proportions of 0.006 percent, 0.71 percent, and 99.28 percent respectively —symbol U — see Chemical Elements Table
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