inertial navigation

noun

variants or less commonly inertial guidance
: guidance (as of an aircraft or spacecraft) by means of self-contained automatically controlling devices that respond to inertial forces

called also inertial navigation

Word History

First Known Use

circa 1948, in the meaning defined above

Time Traveler
The first known use of inertial navigation was circa 1948

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Cite this Entry

“Inertial navigation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inertial%20navigation. Accessed 10 Nov. 2025.

Last Updated: - Definition revised
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