aero·​stat | \ ˈer-ō-ˌstat How to pronounce aerostat (audio) \

Definition of aerostat

: a lighter-than-air aircraft (such as a balloon or blimp) — compare aerodyne

Examples of aerostat in a Sentence

Recent Examples on the Web Then a tether rope was cut and the aerostat soared up at a 60 degree angle to the applause and cheers of the throng. Merrie Monteagudo, San Diego Union-Tribune, 9 Apr. 2021 The imaging system, dubbed the MX-15, attached to the underbelly of the aerostat was roughly the size of a beach ball. Annie Jacobsen, Wired, 20 Jan. 2021 Things are looking good: The sun and a waning gibbous moon compete for attention in a nearly cloudless sky, and an aerostat tethered close to the pad registers almost no wind. Daniel Oberhaus, Wired, 19 Dec. 2019 The aerostat is part of the JLENS surveillance system, designed detect low-flying Russian cruise missiles fired from submarines against the Eastern Seaboard. Kyle Mizokami, Popular Mechanics, 28 Oct. 2015 Predators and aerostats, for instance, cannot fly in thunderstorms or high winds. Ron Nixon, New York Times, 20 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aerostat.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of aerostat

1784, in the meaning defined above

History and Etymology for aerostat

borrowed from French aérostat, probably back-formation from aérostatique "of aerostatics," with -stat (after héliostat heliostat) taken as the Greek agentive element -statēs "one who causes to stand" — more at -stat

Keep scrolling for more

Learn More About aerostat

Time Traveler for aerostat

Time Traveler

The first known use of aerostat was in 1784

See more words from the same year

Statistics for aerostat

Cite this Entry

“Aerostat.” Dictionary, Merriam-Webster, Accessed 20 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Anagram puzzles meet word search.

Love words? Need even more definitions?

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