entrain

1 of 2

verb (1)

en·​train in-ˈtrān How to pronounce entrain (audio)
entrained; entraining; entrains

transitive verb

1
: to draw along with or after oneself
2
: to draw in and transport (something, such as solid particles or gas) by the flow of a fluid
3
: to incorporate (air bubbles) into concrete
4
: to determine or modify the phase or period of
circadian rhythms entrained by a light cycle
entrainer noun
entrainment noun

entrain

2 of 2

verb (2)

entrained; entraining; entrains

transitive verb

: to put aboard a train

intransitive verb

: to go aboard a train

Examples of entrain 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.
Verb
As oxidizer flowed over it, tiny droplets of liquid pentane would become entrained in the stream of gas, and the multitude of droplets offered an enormous amount of surface area for evaporation and burning. IEEE Spectrum, 5 Nov. 2014 In the inner solar system—this side of Jupiter—the proximity of the sun causes both free-floating water and water entrained on bodies like asteroids to flash into vapor. Jeffrey Kluger, TIME, 30 Sep. 2024 Heat and humidity constrict and narrow airways, trap ozone, and cause the air to entrain more particulate matter from cars, trucks, and smokestacks. Jeffrey Kluger, TIME, 24 May 2024 When thunderstorms blossom, their updrafts can vertically entrain and stretch any nascent low-level swirl, helping to establish a more cohesive center of circulation. Matthew Cappucci, Washington Post, 18 Oct. 2023 See All Example Sentences for entrain

Word History

Etymology

Verb (1)

Middle French entrainer, from en- + trainer to draw, drag — more at train entry 2

First Known Use

Verb (1)

1568, in the meaning defined at sense 1

Verb (2)

1878, in the meaning defined at transitive sense

Time Traveler
The first known use of entrain was in 1568

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Cite this Entry

“Entrain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/entrain. Accessed 26 Feb. 2025.

Kids Definition

entrain

verb
en·​train
in-ˈtrān
: to put or go aboard a train

Medical Definition

entrain

transitive verb
en·​train in-ˈtrān How to pronounce entrain (audio)
: to determine or modify the phase or period of
circadian rhythms entrained by a light cycle
entrainment noun

More from Merriam-Webster on entrain

Last Updated: - Updated example sentences
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