unmanned

adjective

un·​manned ˌən-ˈmand How to pronounce unmanned (audio)
1
see usage paragraph below : not carrying, staffed, or performed by people : not manned
an unmanned railroad crossing
unmanned spaceflight
2
of a hawk : not trained
Usage of Manned and Unmanned

While manned and unmanned are still commonly used in news sources to describe spaceflights, NASA has since the early 21st century used and prescribed non-gender-specific terms, preferring such descriptors as human, piloted, and crewed for the former, and unpiloted and uncrewed for the latter.

Examples of unmanned in a Sentence

Recent Examples on the Web Raytheon has used game engines to simulate the deployment of new military technologies, including autonomous drone swarms and fleets of unmanned ground vehicles in dense cities. Anna Wiener, The New Yorker, 15 Apr. 2024 Iran's Islamic Revolutionary Guard Corps launched 170 unmanned aerial vehicles (UAVs), more than 120 ballistic missiles and more than 30 cruise missiles in the attack, according to Hagari. Melissa Gaffney, ABC News, 14 Apr. 2024 Israel’s probe of the WCK attack found that operators of the unmanned aerial vehicle tracking the convoy were not made aware of its coordination plan. Louisa Loveluck, Washington Post, 6 Apr. 2024 Here’s how to do it with a Roomba: [ iRobot ] The video demonstrates the wave-basin testing of a 43 kg (95 lb) amphibious cycloidal propeller unmanned underwater vehicle (Cyclo-UUV) developed at the Advanced Vertical Flight Laboratory, Texas A&M University. IEEE Spectrum, 5 Apr. 2024 The ultramarathon is marked with unique unmanned checkpoints, each of which contains a paperback book. Ben Morse, CNN, 23 Mar. 2024 The unmanned spaceship blasted off successfully from the company's base in Boca Chica, Texas, at 8:25 a.m. local time. Gina Sunseri, ABC News, 14 Mar. 2024 After a day and a half of work, the unmanned submersible returns to the Offshore Surveyor. Thomas Curwen, Los Angeles Times, 13 Mar. 2024 With western military aid looking far from certain and artillery ammunition running low, the pressure on Ukraine’s unmanned air capacity has only grown, leaving Kyiv’s forces in an increasingly perilous position. Yurii Shyvala, New York Times, 12 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unmanned.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1544, in the meaning defined at sense 1

Time Traveler
The first known use of unmanned was in 1544

Dictionary Entries Near unmanned

Cite this Entry

“Unmanned.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unmanned. Accessed 25 Apr. 2024.

Kids Definition

unmanned

adjective
un·​manned ˌən-ˈmand How to pronounce unmanned (audio)
ˈən-
: having no crew aboard
an unmanned spacecraft

More from Merriam-Webster on unmanned

Last Updated: - Updated example sentences
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