ple·​num | \ ˈple-nəm How to pronounce plenum (audio) , ˈplē- How to pronounce plenum (audio) \

Definition of plenum

1a : a space or all space every part of which is full of matter
b : an air-filled space in a structure especially : one that receives air from a blower for distribution (as in a ventilation system)
2 : a general assembly of all members especially of a legislative body
3 : the quality or state of being full

Examples of plenum in a Sentence

Recent Examples on the Web Chevy used that space to enlarge the intake air plenum from 11.1 liters of volume to 14.1 liters. Dan Carney, Popular Science, "The Corvette is finally the supercar it deserves to be," 2 Jan. 2020 Kim is still widely expected to threaten a harder line approach to the United States during the Central Committee plenum and his New Year’s speech., "One of the highest decision-making bodies in North Korea, the Central Committee of the ruling Workers’ Party usually rubber-stamps any policy proposed by Kim, who rules his country with totalitarian control of the party, the military, and all other levers of power.," 31 Dec. 2019 Pressure sensors first indicate that there is fuel leaking into MarCO-B’s plenum, a pressurized chamber that holds the gas before valves route it through the thrusters. Joe Pappalardo, Popular Mechanics, "How a Small CubeSat Became the Unlikely Hero of the InSight Landing," 29 Nov. 2018 The party plenum is likely to see a strong criticism against the United States and South Korea. Washington Post, "Kim Jong Un is back on his white horse, as North Korea flags a big decision," 4 Dec. 2019 The Communist Party's plenum meetings are one of the country's main forums for major changes of party policy and have previously changed the course of Chinese history. Ben Westcott, CNN, "China's top political body met in secret and issued an ominous message to Hong Kong," 1 Nov. 2019 On Friday, Shen also announced other measures with regard to Hong Kong and Macao which had been approved during the plenum -- a rare meeting of top Communist leaders at which policies for the years ahead are set. Ben Westcott, CNN, "Beijing says it will change how Hong Kong's leader is 'appointed and removed'," 1 Nov. 2019 Increasingly, critical fasteners like cylinder-head bolts, engine-mount fasteners and intake plenum bolts require what's referred to as torque-plus-angle tightening. Popular Mechanics Editors, Popular Mechanics, "How to Use a Torque Wrench to Keep Your Car from Flying Apart," 26 Feb. 2019 Even worse, the tank leak into the plenum isn't the only one. Joe Pappalardo, Popular Mechanics, "How a Small CubeSat Became the Unlikely Hero of the InSight Landing," 29 Nov. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plenum.' 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 plenum

1678, in the meaning defined at sense 1a

History and Etymology for plenum

New Latin, from Latin, neuter of plenus

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Time Traveler for plenum

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The first known use of plenum was in 1678

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Last Updated

15 Jan 2020

Cite this Entry

“Plenum.” Dictionary, Merriam-Webster, Accessed 18 Feb. 2020.

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