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

Some farms breed onsite, others buy from propagation specialists. Eric Velasco, al, "Follow the journey of local food from seed to plate," 13 Aug. 2019 Back propagation was first applied to these networks in the 1970s, but the field suffered after Marvin Minsky and Seymour Papert’s criticism of one-layer perceptrons. Quanta Magazine, "How to Win at Deep Learning," 9 Oct. 2017 Otra Cosa will become a seed sanctuary on the island, focusing on the propagation, collection and sharing of indigenous seeds and beans, complete with a social media . Illyanna Maisonet,, "An ode to the soulful magic of simple beans," 19 July 2019 The strongest chinquapins will be chosen for propagation. Robert Langellier, National Geographic, "A legendary Ozark chestnut tree, thought extinct, is rediscovered," 24 June 2019 Upcoming weekend workshops include block printing, sashiko embroidery, upcycled self-watering planter, test tube propagation station and DIY Bitters, in which folks 21 years old and up will create a custom blend. Dewayne Bevil,, "Orlando Science Center: Stargazing, DIY mouse-ear headband sessions set for late-night event," 2 July 2019 As incident light hits these elements, many of its properties change—including its polarization, intensity, phase and direction of propagation. Alberto Moscatelli, Scientific American, "Tiny Lenses Will Enable Design of Miniature Optical Devices," 1 July 2019 There are currently around 50 fish in the captive refuge, says Gumm, and another ten to twenty maturing in the propagation laboratory, some of which have also started producing eggs. Jason Bittel, National Geographic, "Brutal beetles kept world’s rarest fish from breeding—until now," 1 Mar. 2019 In particular, the string propagation in both spaces turns out to be identical. Quanta Magazine, "Quantum Questions Inspire New Math," 30 Mar. 2017

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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Last Updated

16 Aug 2019

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

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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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More from Merriam-Webster on propagation

Rhyming Dictionary: Words that rhyme with propagation

Spanish Central: Translation of propagation

Nglish: Translation of propagation for Spanish Speakers Encyclopedia article about propagation

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