alternating current

noun

: an electric current that reverses its direction at regularly recurring intervals
abbreviation AC

Examples of alternating current 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.
These devices convert direct-current electricity to grid-compatible alternating current, and allow batteries, solar photovoltaics and wind turbines to connect to the grid. IEEE Spectrum, 24 Dec. 2024 Grid-forming converters for HVDC, which convert high-voltage direct current to alternating current and vice versa, are also commercially available, from companies including Hitachi, Siemens, and GE Vernova. Benjamin Kroposki, IEEE Spectrum, 13 Apr. 2024 The whole array is hardwired to a compact power unit in the rear of the car, which converts solar power into 120-volt alternating current. Ben Coxworth, New Atlas, 10 Dec. 2024 Electricity generated at power plants has what’s called an alternating current — its direction swaps 60 times per second. Evan Simko-Bednarski, New York Daily News, 3 Nov. 2024 See all Example Sentences for alternating current 

Word History

First Known Use

1833, in the meaning defined above

Time Traveler
The first known use of alternating current was in 1833

Dictionary Entries Near alternating current

Cite this Entry

“Alternating current.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alternating%20current. Accessed 6 Jan. 2025.

Kids Definition

alternating current

noun
: an electric current that reverses its direction at regular intervals
abbreviation AC

More from Merriam-Webster on alternating current

Last Updated: - Updated example sentences
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