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.
He said that the main power substation of Sevastopol had been hit during the attacks.
From BBC ● Jun. 24, 2026
On a recent day, a group of emergency energy engineers gathered at a transformer substation to carry out repairs after residents turned on all their equipment at once when power was restored, overloading the system.
From The Wall Street Journal ● Feb. 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
In October, a Russian strike on a substation near Chernobyl cut power flowing to the confinement structure.
From Barron's ● Dec. 26, 2025
They found themselves in a tiny substation, empty, airless, ruined.
From "I, Robot" by Isaac Asimov
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.
