propagation

noun

prop·​a·​ga·​tion ˌprä-pə-ˈgā-shən How to pronounce propagation (audio)
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Their lab now influences how global companies specify components and design for longevity, safety, and ROI, helping prevent thermal runaway propagation, mitigate corrosion, and elevate system ruggedness. Malana Vantyler, USA Today, 3 Sep. 2025 Using high-resolution bathymetric maps from its deep-sea sonar surveys, along with real-time oceanographic data on temperature, salinity, and currents collected by buoys and research vessels, the PLA has built detailed models of acoustic propagation. Bojan Stojkovski, Interesting Engineering, 31 Aug. 2025 At a time when social isolation, information silos and the deliberate propagation of misinformation in the real world are fueling widespread and dangerous conspiratorial beliefs and real acts of violence, a story like this, with characters like these, seems frighteningly plausible. Scott Feinberg, HollywoodReporter, 31 Aug. 2025 First, the propagation delay from each sensor to the brain is predictable. Petar Popovski, IEEE Spectrum, 13 Aug. 2025 See All Example Sentences for propagation

Word History

First Known Use

15th century, in the meaning defined above

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

Browse Nearby Words

Cite this Entry

“Propagation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/propagation. Accessed 9 Sep. 2025.

Kids Definition

propagation

noun
prop·​a·​ga·​tion ˌpräp-ə-ˈgā-shən How to pronounce propagation (audio)
: the act or process of propagating: as
a
: multiplication (as of a kind of living thing) in number of individuals
b
: the spreading of something (as a belief) abroad or into new regions

Medical Definition

propagation

noun
prop·​a·​ga·​tion ˌpräp-ə-ˈgā-shən How to pronounce propagation (audio)
: 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
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!