direct current

noun

: an electric current flowing in one direction only and substantially constant in value
abbreviation DC

Examples of direct 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.
Driving the news: Last month, climate entrepreneur Vic Shao officially launched his startup DC Grid, which sells off-grid power systems based on direct current (DC) for companies operating data centers and EV chargers. Katie Fehrenbacher, Axios, 2 Jan. 2025 Today MOSFETs and other silicon carbide transistors greatly reduce on-state loss and switching losses in power-conversion systems, such as the inverters in an electric vehicle used to convert the battery’s direct current to the alternating current that drives the motor. IEEE Spectrum, 23 June 2024 One of Tesla's most significant contributions was the development of the alternating current (AC) electrical system, which is far more efficient than direct current (DC) for transmitting electricity over long distances. Vibhas Ratanjee, Forbes, 10 Jan. 2025 Cognitive behavioral therapy, cognitive remediation, mindfulness, psychoeducation and transcranial direct current stimulation were also more effective than a placebo at reducing patients’ symptoms, but this outcome was reported by clinicians only. Kristen Rogers, CNN, 17 Dec. 2024 See All Example Sentences for direct current

Word History

First Known Use

1849, in the meaning defined above

Time Traveler
The first known use of direct current was in 1849

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Cite this Entry

“Direct current.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/direct%20current. Accessed 1 Mar. 2025.

Kids Definition

direct current

noun
: an electric current flowing in one direction only
abbreviation DC

Medical Definition

direct current

noun
: an electric current flowing in one direction only and substantially constant in value
abbreviation DC

More from Merriam-Webster on direct current

Last Updated: - Updated example sentences
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