✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

magnetic field

noun

: the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected

Examples of magnetic field 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.
How the magnet steered microrobot works The robot sits inside a capsule that surgeons guide with magnetic fields. Kurt Knutsson, FOXNews.com, 4 Dec. 2025 That demonstrates a highly stressed magnetic field, a prime environment for an explosive release — and that's exactly what happened. Stefanie Waldek, Space.com, 4 Dec. 2025 To add to this complexity, streams of particles and magnetic fields from the Sun – known as space weather – can cause the density of air particles in low Earth orbit to fluctuate in unpredictable ways. Mojtaba Akhavan-Tafti, The Conversation, 3 Dec. 2025 Sunspots are temporary dark areas on the sun that occur when intense magnetic fields block out heat from the interior of the sun. Claire Cameron, Scientific American, 28 Nov. 2025 See All Example Sentences for magnetic field

Word History

First Known Use

1845, in the meaning defined above

Time Traveler
The first known use of magnetic field was in 1845

Browse Nearby Words

Cite this Entry

“Magnetic field.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetic%20field. Accessed 9 Dec. 2025.

Kids Definition

magnetic field

noun
: the portion of space near a magnetic body or a body carrying an electric current within which magnetic forces due to the body or current can be detected

Medical Definition

magnetic field

noun
: the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected
the magnetic field of the heart

More from Merriam-Webster on magnetic field

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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