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
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An extraterrestrial settlement in an environment like Mars — with its lack of magnetic field and thin, toxic atmosphere — would likely necessitate the invention of numerous new technologies. Jackie Wattles, CNN Money, 24 June 2026 These startups are working with a range of different non-invasive sensor modalities, including those that measure electrical pulses (EEG), those that measure magnetic fields (MEG), and those that use light to measure changes in blood flow (fNIRS). Rob Toews, Forbes.com, 22 June 2026 Transcranial magnetic stimulation, which uses magnetic fields to stimulate nerve cells in the brain, has also been trialled for efficacy. Amanda Petrusich, New Yorker, 22 June 2026 In plain terms, these sensors may help map weak magnetic fields near steel, cables or electrical conductors. Alex Krasnok, Fortune, 21 June 2026 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 25 Jun. 2026.

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

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