ohm

noun

ˈōm How to pronounce ohm (audio)
: 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
ˈō-mik How to pronounce ohm (audio)
adjective
ohmically
ˈō-mi-k(ə-)lē How to pronounce ohm (audio)
adverb

Examples of ohm 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.
The first International Electrical Congress also convened during the exposition, with participants presenting papers, discussing research, and deciding on definitions for the ampere, the volt, the ohm, and other electrical units. — IEEE Spectrum, 8 Aug. 2018 Its frequency range is stated as an impressive 13 Hz to 35 kHz, and a nominal impedance of 8 ohms, dipping to 3 ohms. — Robert Ross, Robb Report, 10 July 2024

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

Rhymes for ohm

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Cite this Entry

“Ohm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ohm. Accessed 24 Mar. 2025.

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Kids Definition

ohm

noun
ˈōm How to pronounce ohm (audio)
: 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
ˈō-mik How to pronounce ohm (audio)
adjective

Medical Definition

ohm

noun
ˈōm How to pronounce ohm (audio)
: 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
ˈō-mik How to pronounce ohm (audio)
adjective

Biographical Definition

Ohm

biographical name

ˈōm How to pronounce Ohm (audio)
Georg Simon 1787–1854 German physicist

More from Merriam-Webster on ohm

Nglish: Translation of ohm for Spanish Speakers

Britannica.com: Encyclopedia article about ohm

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