field strength

American

noun

Physics.

the vector sum of all forces exerted by a field on a unit mass, unit charge, unit magnetic pole, etc., at a given point within the field.

field strength British

noun

radio television the intensity of an electromagnetic wave at any point in the area covered by a radio or television transmitter
physics the intensity of an electric or magnetic field See intensity

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of field strength

First recorded in 1895–1900

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Such maps show deviations from the average field strength over the surface of the Earth.

From The Wall Street Journal • Nov. 20, 2025

Understanding how Earth's magnetic field strength has varied over time is also key for determining when Earth's inner, solid core began to form.

From Science Daily • Apr. 24, 2024

Because of the different gravitational field strength on the Moon, time moves quicker there relative to Earth - 58.7 microseconds every day.

From BBC • Apr. 3, 2024

Reduce the field strength by a factor of 25 and the polarization falls with it.

From Science Magazine • Feb. 22, 2023

The sunspots, sometimes visible to the naked eye at sunset, are cooler regions of enhanced magnetic field strength.

From "Cosmos" by Carl Sagan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023