reentry

noun

re·​en·​try (ˌ)rē-ˈen-trē How to pronounce reentry (audio)
1
: a retaking possession
especially : entry by a lessor on leased premises on the tenant's failure to perform the conditions of the lease
2
: a second or new entry
3
: a playing card that will enable a player to regain the lead
4
: the action of reentering the earth's atmosphere after travel in space

Examples of reentry in a Sentence

Recent Examples on the Web
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There is also the risk that a micrometeoroid could punch a hole in one of the heat-resistant outer tiles on the Orion spacecraft, NASA's crew capsule for the agency's Artemis moon missions, undermining its ability to survive the intense furnace of reentry, per NASA. Anthony Wood, Space.com, 7 June 2026 This was also important for the return to Earth, because the agency didn’t want to overweight one side of the spacecraft with equipment and throw off the balance of the spacecraft during reentry and splashdown. New Atlas, 6 June 2026 The decision reflects a growing recognition that successful reentry is an important component of public safety, workforce development, housing stability, and community well-being. Beth Hines, Hartford Courant, 4 June 2026 SpaceX will soon test reentry vehicles that could enable in-space manufacturing and rapid point-to-point cargo delivery, according to documents from the Federal Aviation Administration (FAA). Chris Young, Interesting Engineering, 1 June 2026 See All Example Sentences for reentry

Word History

First Known Use

15th century, in the meaning defined at sense 1

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

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Cite this Entry

“Reentry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reentry. Accessed 18 Jun. 2026.

Kids Definition

reentry

noun
re·​en·​try (ˈ)rē-ˈen-trē How to pronounce reentry (audio)
1
: a second or new entry
2
: the action of reentering the earth's atmosphere after travel in space

Medical Definition

reentry

noun
re·​en·​try (ˈ)rē-ˈen-trē How to pronounce reentry (audio)
plural reentries
: a cardiac mechanism that is held to explain certain abnormal heart actions (as tachycardia) and that involves the transmission of a wave of depolarization along an alternate pathway when the original pathway is blocked with return of the impulse along the blocked pathway when the alternate pathway is refractory and then transmission along the open pathway resulting in an abnormality

Legal Definition

reentry

noun
re·​en·​try ˌrē-ˈen-trē How to pronounce reentry (audio)
: a retaking possession of property by a lessor or grantor in exercise of the right to do so upon the failure of the lessee or grantee to fulfill a covenant or condition see also power of termination at power sense 2b

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