substation
Americannoun
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a branch of a main post office.
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an auxiliary power station where electrical current is converted, as from AC to DC, voltage is stepped up or down, etc.
noun
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a subsidiary station
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an installation at which electricity is received from one or more power stations for conversion from alternating to direct current, reducing the voltage, or switching before distribution by a low-tension network
Etymology
Origin of substation
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.
EirGrid, the state-owned electric power transmission operator, spent 100 million euros, equivalent to $116 million, building a new substation to serve some 200,000 planned homes nearby.
From The Wall Street Journal • Jun. 7, 2026
One of the big opportunities is Valmont Industries, the largest supplier of poles, pylons, and substation hardware in the U.S.
From Barron's • May 15, 2026
West Virginia is now on the frontline of a national shift that most people won’t notice until it shows up in their own bills, water tables or the substation down the road.
From Salon • Dec. 28, 2025
The fire broke out inside a PG&E power substation at about 2:15 p.m.
From Los Angeles Times • Dec. 21, 2025
They run, as carefully and as quickly as they can, until they reach the wide platform of a substation.
From "The Kill Order (Maze Runner, Book Four; Origin)" by James Dashner
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
