prop·​a·​ga·​tion | \ ˌprä-pə-ˈgā-shən How to pronounce propagation (audio) \

Definition of propagation

: the act or action of propagating: such as
a : increase (as of a kind of organism) in numbers
b : the spreading of something (such as a belief) abroad or into new regions
c : enlargement or extension (as of a crack) in a solid body

Examples of propagation in a Sentence

Recent Examples on the Web William Happer, a former N.S.C. official and an expert on radiation propagation, who was involved in the discussions, said that his C.I.A. colleagues didn’t know what to make of the new cases. Adam Entous, The New Yorker, 24 May 2021 Trufficulture revived in the 1970s, when French scientists finally solved the mysteries of black truffle propagation. Andrew Kornylak, Smithsonian Magazine, 18 May 2021 Since April last year, there has been an institutional strategy for the propagation of Covid-19 in Brazil, led by the President but implemented by the entire federal government to achieve herd immunity through contagion. Rodrigo Pedroso And Marcia Reverdosa, CNN, 27 Apr. 2021 The scientists model the propagation of tsunamis from earthquakes on these normal faults and find their new type of model can well explain the tsunami report from Alexandria by Ammianus Marcellinus, a historic writer. David Bressan, Forbes, 17 May 2021 In addition to a live field trip, online options will introduce viewers to a variety of local activities, including garden tours, rare plant conservation, and propagation. San Diego Union-Tribune, 17 Apr. 2021 While the Waldos pioneered the term, their connections with the inner circle of the Grateful Dead catapulted the propagation of 420 into our language. Zoe Wilder, Rolling Stone, 19 Apr. 2021 Interest in plant propagation has climbed during the pandemic., 18 Apr. 2021 Hosta grower Al Ritchey said the hosta, known as the friendship plant, had just a few varieties years ago but the numbers increased due to propagation. Joanne Kempinger Demski, Milwaukee Journal Sentinel, 15 Apr. 2021

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

15th century, in the meaning defined above

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Time Traveler for propagation

Time Traveler

The first known use of propagation was in the 15th century

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Statistics for propagation

Last Updated

13 Jun 2021

Cite this Entry

“Propagation.” Dictionary, Merriam-Webster, Accessed 23 Jun. 2021.

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More Definitions for propagation


prop·​a·​ga·​tion | \ ˌprä-pə-ˈgā-shən How to pronounce propagation (audio) \

Kids Definition of propagation

: the act or process of causing to multiply or spread out the propagation of ideas


prop·​a·​ga·​tion | \ ˌpräp-ə-ˈgā-shən How to pronounce propagation (audio) \

Medical Definition of propagation

: the act or action of propagating: as
a : increase (as of a kind of organism) in numbers propagation of a pure culture of bacteria
b : the spreading or transmission of something propagation of a nerve impulse


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