: the practical meter-kilogram-second unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
ohmic adjective
ohmically adverb

Examples of ohm in a Sentence

Recent Examples on the Web Payne drew inspiration for the company’s name from Georg Simon Ohm, a 19th Century German physicist and mathematician whose research led to Ohm’s law, the relationship between voltage, current and resistance in an electrical circuit, and the ohm, the unit of electrical resistance. Georgann Yara, The Arizona Republic, 11 Jan. 2024 Now flip the switch On and the meter should read less than one ohm. Joseph Truini, Popular Mechanics, 29 Mar. 2022 Indicator light: Power the LED indicator light with the + 29-V DC from the power-supply output and limit the current with a 10k-ohm, ½-watt resistor. IEEE Spectrum, 31 Oct. 2018 In general, speakers with a lower rating like 4 ohms will need a more powerful receiver to drive them, while 8-ohm speakers, which are the most common, will work with most receivers. Don Melanson, Popular Mechanics, 18 July 2018

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

Word History

Etymology

Georg Simon Ohm

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of ohm was in 1861

Dictionary Entries Near ohm

Cite this Entry

“Ohm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ohm. Accessed 23 Feb. 2024.

Kids Definition

ohm

noun
: a unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
ohmic adjective

Medical Definition

ohm

noun
: the practical mks unit of electrical resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
ohmic adjective

Biographical Definition

Ohm

biographical name

Georg Simon 1787–1854 German physicist

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